commit e8567f9bdeda2a08e733b38187685566e38fb137
Author: Heerko <heerko@swummoq.net>
Date:   Mon Jul 18 23:50:31 2022 +0200

    initial

diff --git a/.vscode/configurationCache.log b/.vscode/configurationCache.log
new file mode 100644
index 0000000..65d294d
--- /dev/null
+++ b/.vscode/configurationCache.log
@@ -0,0 +1 @@
+{"buildTargets":["all","clean","dist","help","html"],"launchTargets":[],"customConfigurationProvider":{"workspaceBrowse":{"browsePath":[],"compilerArgs":[]},"fileIndex":[]}}
\ No newline at end of file
diff --git a/.vscode/dryrun.log b/.vscode/dryrun.log
new file mode 100644
index 0000000..96e1054
--- /dev/null
+++ b/.vscode/dryrun.log
@@ -0,0 +1,10 @@
+make --dry-run --always-make --keep-going --print-directory
+make: Entering directory `/Users/hrk/_HACKERSANDDESIGNERS/Presentations/soilpunk_joulethief'
+echo ""
+echo "--Help Menu"
+echo ""
+echo "1. make html"
+echo "2. make dist"
+echo "3. make clean"
+make: Leaving directory `/Users/hrk/_HACKERSANDDESIGNERS/Presentations/soilpunk_joulethief'
+ 
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..e02947d
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,4 @@
+{
+	"restructuredtext.confPath": "",
+	"esbonio.sphinx.confDir": ""
+}
\ No newline at end of file
diff --git a/.vscode/targets.log b/.vscode/targets.log
new file mode 100644
index 0000000..e5479eb
--- /dev/null
+++ b/.vscode/targets.log
@@ -0,0 +1,340 @@
+make all --print-data-base --no-builtin-variables --no-builtin-rules --question
+# GNU Make 3.81
+# Copyright (C) 2006  Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.
+# There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+# This program built for i386-apple-darwin11.3.0
+ 
+
+# Make data base, printed on Mon Jul 18 21:08:56 2022
+
+# Variables
+
+# automatic
+<D = $(patsubst %/,%,$(dir $<))
+# environment
+RUBY_VERSION = 3.1.2
+ 
+# automatic
+?F = $(notdir $?)
+# makefile (from `makefile', line 2)
+RST := slides.rst
+# automatic
+?D = $(patsubst %/,%,$(dir $?))
+# environment
+PLATFORMIO_IDE = 2.5.0
+# automatic
+@D = $(patsubst %/,%,$(dir $@))
+# automatic
+@F = $(notdir $@)
+# makefile
+CURDIR := /Users/hrk/_HACKERSANDDESIGNERS/Presentations/soilpunk_joulethief
+# makefile
+SHELL = /bin/sh
+# environment
+DIRHISTORY_SIZE = 30
+# environment
+VSCODE_NLS_CONFIG = {"locale":"en-gb","availableLanguages":{},"_languagePackSupport":true}
+# environment
+_ = /usr/bin/make
+# makefile (from `makefile', line 1)
+MAKEFILE_LIST :=  makefile
+# environment
+__CFBundleIdentifier = com.microsoft.VSCode
+# environment
+INFOPATH = /opt/homebrew/share/info:/opt/homebrew/share/info:
+# makefile (from `makefile', line 5)
+HTML := `whoami`-`date  '+%Y-%m-%d'`.html
+# environment
+P9K_SSH = 0
+# environment
+VSCODE_CWD = /
+# environment
+NO_PROXY = 127.0.0.1
+# environment
+LSCOLORS = Gxfxcxdxbxegedabagacad
+# environment
+RUBYOPT = 
+# environment
+LaunchInstanceID = 8B758BDD-8E56-461B-B453-FF79EC0DA5A4
+# environment
+ELECTRON_RUN_AS_NODE = 1
+# default
+.FEATURES := target-specific order-only second-expansion else-if archives jobserver check-symlink
+# environment
+SSH_AUTH_SOCK = /private/tmp/com.apple.launchd.hNCYCbJcx9/Listeners
+# automatic
+%F = $(notdir $%)
+# environment
+CONDA_EXE = /Users/hrk/opt/anaconda3/bin/conda
+# environment
+PWD = /Users/hrk/_HACKERSANDDESIGNERS/Presentations/soilpunk_joulethief
+# environment
+HOMEBREW_CELLAR = /opt/homebrew/Cellar
+# environment
+GEM_HOME = /Users/hrk/.gem/ruby/3.1.2
+# environment
+ORIGINAL_XDG_CURRENT_DESKTOP = undefined
+# environment
+MAMP_PHP = /Applications/MAMP/bin/php/php7.2.8/bin/php
+# environment
+MANPATH = /opt/homebrew/share/man:/opt/homebrew/share/man:::
+# environment
+VSCODE_AMD_ENTRYPOINT = vs/workbench/api/node/extensionHostProcess
+# environment
+PYENV_SHELL = zsh
+# environment
+HOME = /Users/hrk
+# makefile (from `makefile', line 9)
+OUTDIR := html_output
+# default
+MAKEFILEPATH := /Applications/Xcode.app/Contents/Developer/Makefiles
+# environment
+VSCODE_CODE_CACHE_PATH = /Users/hrk/Library/Application Support/Code/CachedData/b06ae3b2d2dbfe28bca3134cc6be65935cdfea6a
+# environment
+LOGNAME = hrk
+# environment
+APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL = 1
+# environment
+CONDA_PROMPT_MODIFIER = (base) 
+# environment
+VSCODE_HANDLES_UNCAUGHT_ERRORS = true
+# automatic
+^D = $(patsubst %/,%,$(dir $^))
+# environment
+GEM_PATH = /Users/hrk/.gem/ruby/3.1.2:/Users/hrk/.rubies/ruby-3.1.2/lib/ruby/gems/3.1.0
+# environment
+CONDA_DEFAULT_ENV = base
+# environment
+PLATFORMIO_PATH = /Users/hrk/.platformio/python3/bin:/Users/hrk/.pyenv/shims:/Users/hrk/opt/anaconda3/bin:/Users/hrk/opt/anaconda3/condabin:/Users/hrk/.gem/ruby/3.1.2/bin:/Users/hrk/.rubies/ruby-3.1.2/lib/ruby/gems/3.1.0/bin:/Users/hrk/.rubies/ruby-3.1.2/bin:/opt/homebrew:/usr/local/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:/Applications/Visual Studio Code.app/Contents/Resources/app/bin:/Users/hrk/src
+# default
+MAKE = $(MAKE_COMMAND)
+# default
+MAKECMDGOALS := all
+# environment
+PATH = /Users/hrk/.pyenv/shims:/Users/hrk/opt/anaconda3/bin:/Users/hrk/opt/anaconda3/condabin:/Users/hrk/.gem/ruby/3.1.2/bin:/Users/hrk/.rubies/ruby-3.1.2/lib/ruby/gems/3.1.0/bin:/Users/hrk/.rubies/ruby-3.1.2/bin:/opt/homebrew:/usr/local/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:/Applications/Visual Studio Code.app/Contents/Resources/app/bin:/Users/hrk/src
+# environment
+SHLVL = 1
+# environment
+RUBY_ROOT = /Users/hrk/.rubies/ruby-3.1.2
+# environment
+XPC_FLAGS = 0x0
+# default
+MAKE_VERSION := 3.81
+# environment
+USER = hrk
+# makefile
+.DEFAULT_GOAL := all
+# environment
+RUBY_ENGINE = ruby
+# environment
+LESS = -R
+# automatic
+%D = $(patsubst %/,%,$(dir $%))
+# environment
+CONDA_SHLVL = 1
+# default
+MAKE_COMMAND := /Applications/Xcode.app/Contents/Developer/usr/bin/make
+# default
+.VARIABLES := 
+# environment
+TMPDIR = /var/folders/k0/90zw5hsn7wn5fg0h7ps27qbr0000gn/T/
+# automatic
+*F = $(notdir $*)
+# environment
+VSCODE_IPC_HOOK = /Users/hrk/Library/Application Support/Code/1.69.1-main.sock
+# environment
+MallocNanoZone = 0
+# makefile
+MAKEFLAGS = Rrqp
+# environment
+MFLAGS = -Rrqp
+# automatic
+*D = $(patsubst %/,%,$(dir $*))
+# environment
+XPC_SERVICE_NAME = application.com.microsoft.VSCode.42374087.42374093
+# environment
+HOMEBREW_PREFIX = /opt/homebrew
+# automatic
+ 
++D = $(patsubst %/,%,$(dir $+))
+# makefile (from `makefile', line 4)
+AUTHOR := `whoami`
+# automatic
++F = $(notdir $+)
+# environment
+HOMEBREW_REPOSITORY = /opt/homebrew
+# environment
+__CF_USER_TEXT_ENCODING = 0x1F5:0x0:0x0
+# environment
+COMMAND_MODE = unix2003
+# default
+MAKEFILES := 
+# automatic
+<F = $(notdir $<)
+# environment
+PLATFORMIO_CALLER = vscode
+# environment
+PAGER = less
+# environment
+LC_ALL = C
+# environment
+CONDA_PYTHON_EXE = /Users/hrk/opt/anaconda3/bin/python
+# environment
+SECURITYSESSIONID = 186b2
+# automatic
+^F = $(notdir $^)
+# default
+SUFFIXES := 
+# environment
+GEM_ROOT = /Users/hrk/.rubies/ruby-3.1.2/lib/ruby/gems/3.1.0
+# environment
+_CE_M = 
+# environment
+MAKELEVEL := 0
+# makefile (from `makefile', line 7)
+TODAY := `date  '+%Y-%m-%d'`
+# environment
+CONDA_PREFIX = /Users/hrk/opt/anaconda3
+# environment
+VSCODE_PID = 1635
+# environment
+_CE_CONDA = 
+# environment
+LANG = C
+# variable set hash-table stats:
+# Load=95/1024=9%, Rehash=0, Collisions=5/123=4%
+
+# Pattern-specific Variable Values
+
+# No pattern-specific variable values.
+
+# Directories
+
+# . (device 16777234, inode 42373571): 12 files, no impossibilities.
+
+# 12 files, no impossibilities in 1 directories.
+
+# Implicit Rules
+
+# No implicit rules.
+
+# Files
+
+all: help
+#  Command-line target.
+#  Implicit rule search has been done.
+#  File does not exist.
+#  File has been updated.
+#  Needs to be updated (-q is set).
+# variable set hash-table stats:
+# Load=0/32=0%, Rehash=0, Collisions=0/2=0%
+
+# Not a target:
+.SUFFIXES:
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+
+# Not a target:
+makefile:
+#  Implicit rule search has been done.
+#  Last modified 2022-06-22 20:41:25
+#  File has been updated.
+#  Successfully updated.
+# variable set hash-table stats:
+# Load=0/32=0%, Rehash=0, Collisions=0/0=0%
+
+help:
+#  Implicit rule search has not been done.
+#  Implicit/static pattern stem: `'
+#  File does not exist.
+#  File has been updated.
+#  Needs to be updated (-q is set).
+# automatic
+# @ := help
+# automatic
+# % := 
+# automatic
+# * := 
+# automatic
+# + := 
+# automatic
+# | := 
+# automatic
+# < := 
+# automatic
+# ^ := 
+# automatic
+# ? := 
+# variable set hash-table stats:
+# Load=8/32=25%, Rehash=0, Collisions=1/10=10%
+#  commands to execute (from `makefile', line 15):
+	@echo ""
+	@echo "--Help Menu"
+	@echo ""
+	@echo "1. make html"
+	@echo "2. make dist"
+	@echo "3. make clean"
+	
+
+# Not a target:
+html_output:
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+
+# Not a target:
+.DEFAULT:
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+
+dist: html_output
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+#  commands to execute (from `makefile', line 28):
+	@mkdir dist
+	@cp $(OUTDIR)/index.html dist/$(TODAY)_$(AUTHOR).html
+	@mv $(OUTDIR) $(TODAY)_$(AUTHOR) 
+	@zip -r dist/$(TODAY)_$(AUTHOR).zip $(TODAY)_$(AUTHOR) 
+	@rm -r $(TODAY)_$(AUTHOR)
+	
+
+clean:
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+#  commands to execute (from `makefile', line 35):
+	rm -rf $(OUTDIR)
+	rm -rf dist
+	
+
+html: html_output
+#  Implicit rule search has not been done.
+#  Modification time never checked.
+#  File has not been updated.
+#  commands to execute (from `makefile', line 23):
+	hovercraft $(RST) $(OUTDIR)
+	@cp $(OUTDIR)/index.html $(OUTDIR)/$(TODAY)_$(AUTHOR).html
+	
+
+# files hash-table stats:
+# Load=9/1024=1%, Rehash=0, Collisions=1/26=4%
+# VPATH Search Paths
+
+# No `vpath' search paths.
+
+# No general (`VPATH' variable) search path.
+
+# # of strings in strcache: 1
+# # of strcache buffers: 1
+# strcache size: total = 4096 / max = 4096 / min = 4096 / avg = 4096
+# strcache free: total = 4087 / max = 4087 / min = 4087 / avg = 4087
+
+# Finished Make data base on Mon Jul 18 21:08:56 2022
+
+ 
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,22 @@
+# Soilpunk - Joulethief
+
+## [View the slides here](https://hackersanddesigners.github.io/Soilpunk_technical_setup/html_output/index.html)
+
+----
+
+The slides are generated from a .rst by [Hovercraft](https://github.com/regebro/hovercraft).
+- [Docs](https://hovercraft.readthedocs.io/en/latest/presentations.html#)
+- [RST cheatsheet](https://github.com/ralsina/rst-cheatsheet/blob/master/rst-cheatsheet.rst)
+
+I'm using [Devd](https://github.com/cortesi/devd) and [Modd](https://github.com/cortesi/modd) for serving and live reloading the slides locally. 
+
+Start it all up by running: 
+```
+modd
+```
+And view the slides in your browser at: http://devd.io:8000/
+
+Or to compile it just once:
+```
+make html
+```
\ No newline at end of file
diff --git a/assets/fonts/Avara-Black.otf b/assets/fonts/Avara-Black.otf
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diff --git a/assets/fonts/major_mono_display/Major_Mono.ttf b/assets/fonts/major_mono_display/Major_Mono.ttf
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diff --git a/assets/fonts/major_mono_display/README.txt b/assets/fonts/major_mono_display/README.txt
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index 0000000..c68a277
--- /dev/null
+++ b/assets/fonts/major_mono_display/README.txt
@@ -0,0 +1 @@
+To learn more about the font family and its license, visit https://www.fontmirror.com/major-mono-display
\ No newline at end of file
diff --git a/assets/fonts/nunito/Nunito-Bold.ttf b/assets/fonts/nunito/Nunito-Bold.ttf
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diff --git a/assets/fonts/nunito/Nunito-Light.ttf b/assets/fonts/nunito/Nunito-Light.ttf
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diff --git a/assets/fonts/nunito/Nunito-Regular.ttf b/assets/fonts/nunito/Nunito-Regular.ttf
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diff --git a/assets/fonts/nunito/OFL.txt b/assets/fonts/nunito/OFL.txt
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--- /dev/null
+++ b/assets/fonts/nunito/OFL.txt
@@ -0,0 +1,93 @@
+Copyright (c) 2011, Vernon Adams (vern@newtypography.co.uk),
+with Reserved Font Name Nunito.
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
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diff --git a/assets/images/joulethief_simple.jpeg b/assets/images/joulethief_simple.jpeg
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diff --git a/assets/images/transistor.png b/assets/images/transistor.png
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diff --git a/html_output/2022-07-18_hrk.html b/html_output/2022-07-18_hrk.html
new file mode 100644
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+++ b/html_output/2022-07-18_hrk.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head><title>Soilpunk Joulethief</title><meta charset="UTF-8"></meta><meta name="generator" content="Hovercraft! 1.0 http://regebro.github.com/hovercraft"></meta><meta name="author" content="Heerko van der Kooij"></meta><link rel="stylesheet" href="css/hovercraft.css" media="all"></link><link rel="stylesheet" href="css/highlight.css" media="all"></link><link rel="stylesheet" href="slides.css" media="screen,projection"></link><script type="text/x-mathjax-config">
+      MathJax.Hub.Config({
+        showProcessingMessages: false,
+        messageStyle: "none",
+        TeX : { extensions : ['color.js'] }
+      });
+    </script></head><body class="impress-not-supported"><div id="impress-help"></div><div class="header"><p>Soilpunk &#x1F30F;&#x1F918; - Joulethief</p></div><div id="impress"><div class="step step-level-1" step="0" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="0" data-y="0" data-z="0"><h1 id="soilpunk-joulethief">Soilpunk - Joulethief</h1><p>This document is viewable as <a href="https://github.com/hackersanddesigners/Soilpunk_technical_setup/blob/master/slides.rst">a webpage</a> or as <a href="https://hackersanddesigners.github.io/Soilpunk_technical_setup/html_output/index.html">a slideshow</a></p></div><div class="step step-level-1" step="1" id="joulethief" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="1600" data-y="0" data-z="0"><h1 id="joulethief">Joulethief</h1><img src="./assets/images/joulethief_simple.jpeg"></img></div><div class="step step-level-1" step="2" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="3200" data-y="0" data-z="0"><h1 id="transistor">Transistor</h1><img src="./assets/images/transistor.png" width="300"></img><img src="./assets/images/analogi-transistor-87050130.gif" width="500"></img></div><div class="step step-level-1" step="3" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="4800" data-y="0" data-z="0"><h1 id="joulethief-1">Joulethief</h1><img src="./assets/images/joulethief.jpeg"></img></div><div class="step step-level-1" step="4" id="joulethief-step1" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="6400" data-y="0" data-z="0"><h1 id="joulethief-2">Joulethief</h1><img src="./assets/images/joulethief_1.png"></img><p>A small current flows from the battery through the coil and the base-emitter path of the transistor. This opens the emittor-collector path of the transistor.</p></div><div class="step step-level-1" step="5" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="8000" data-y="0" data-z="0"><h1 id="joulethief-3">Joulethief</h1><img src="./assets/images/joulethief_2.png"></img><p>Electricity is now able to travel through the second coil and through the collector-emitter channel of the transistor.</p></div><div class="step step-level-1" step="6" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="9600" data-y="0" data-z="0"><h1 id="joulethief-4">Joulethief</h1><img src="./assets/images/joulethief_3.png"></img><p>The increasing amount of electricity through the second coil generates a negative voltage in the first coil.
+An negative voltage is induced in the first coil, which cause the transistor to close.</p></div><div class="step step-level-1" step="7" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="11200" data-y="0" data-z="0"><h1 id="joulethief-5">Joulethief</h1><img src="./assets/images/joulethief_4.png"></img><p>With the transistor closed the energy starts to flow through the output (led).</p></div><div class="step step-level-1" step="8" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="12800" data-y="0" data-z="0"><h1 id="joulethief-6">Joulethief</h1><img src="./assets/images/joulethief_5.png"></img><p>The inductor is now powered by the magnetic field of the coil.</p></div><div class="step step-level-1" step="9" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="14400" data-y="0" data-z="0"><h1 id="joulethief-7">Joulethief</h1><img src="./assets/images/joulethief_6.png"></img><p>When the magnetic field is gone, the whole process <a href="#joulethief-step1">starts over</a>.</p></div><div class="step step-level-1" step="10" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="16000" data-y="0" data-z="0"><h1 id="joulethief-8">Joulethief</h1><p>A more detailed explanation can be found on <a href="https://www.instructables.com/Joule-Thief-Circuit-How-to-Make-and-Circuit-Explan/">instructables</a></p></div><div class="step step-level-1" step="11" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="17600" data-y="0" data-z="0"><img src="./assets/images/circuit.png"></img></div><div class="step step-level-1" step="12" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="19200" data-y="0" data-z="0"><p><a href="https://github.com/hackersanddesigners/Soilpunk_joulethief">https://github.com/hackersanddesigners/Soilpunk_joulethief</a></p></div></div><script type="text/javascript" src="js/impress.js"></script><script type="text/javascript" src="js/gotoSlide.js"></script><script type="text/javascript" src="js/hovercraft.js"></script></body></html>
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+<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head><title>Soilpunk Joulethief</title><meta charset="UTF-8"></meta><meta name="generator" content="Hovercraft! 1.0 http://regebro.github.com/hovercraft"></meta><meta name="author" content="Heerko van der Kooij"></meta><link rel="stylesheet" href="css/hovercraft.css" media="all"></link><link rel="stylesheet" href="css/highlight.css" media="all"></link><link rel="stylesheet" href="slides.css" media="screen,projection"></link><script type="text/x-mathjax-config">
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+      });
+    </script></head><body class="impress-not-supported"><div id="impress-help"></div><div class="header"><p>Soilpunk &#x1F30F;&#x1F918; - Joulethief</p></div><div id="impress"><div class="step step-level-1" step="0" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="0" data-y="0" data-z="0"><h1 id="soilpunk-joulethief">Soilpunk - Joulethief</h1><p>This document is viewable as <a href="https://github.com/hackersanddesigners/Soilpunk_technical_setup/blob/master/slides.rst">a webpage</a> or as <a href="https://hackersanddesigners.github.io/Soilpunk_technical_setup/html_output/index.html">a slideshow</a></p></div><div class="step step-level-1" step="1" id="joulethief" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="1600" data-y="0" data-z="0"><h1 id="joulethief">Joulethief</h1><img src="./assets/images/joulethief_simple.jpeg"></img></div><div class="step step-level-1" step="2" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="3200" data-y="0" data-z="0"><h1 id="transistor">Transistor</h1><img src="./assets/images/transistor.png" width="300"></img><img src="./assets/images/analogi-transistor-87050130.gif" width="500"></img></div><div class="step step-level-1" step="3" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="4800" data-y="0" data-z="0"><h1 id="joulethief-1">Joulethief</h1><img src="./assets/images/joulethief.jpeg"></img></div><div class="step step-level-1" step="4" id="joulethief-step1" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="6400" data-y="0" data-z="0"><h1 id="joulethief-2">Joulethief</h1><img src="./assets/images/joulethief_1.png"></img><p>A small current flows from the battery through the coil and the base-emitter path of the transistor. This opens the emittor-collector path of the transistor.</p></div><div class="step step-level-1" step="5" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="8000" data-y="0" data-z="0"><h1 id="joulethief-3">Joulethief</h1><img src="./assets/images/joulethief_2.png"></img><p>Electricity is now able to travel through the second coil and through the collector-emitter channel of the transistor.</p></div><div class="step step-level-1" step="6" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="9600" data-y="0" data-z="0"><h1 id="joulethief-4">Joulethief</h1><img src="./assets/images/joulethief_3.png"></img><p>The increasing amount of electricity through the second coil generates a negative voltage in the first coil.
+An negative voltage is induced in the first coil, which cause the transistor to close.</p></div><div class="step step-level-1" step="7" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="11200" data-y="0" data-z="0"><h1 id="joulethief-5">Joulethief</h1><img src="./assets/images/joulethief_4.png"></img><p>With the transistor closed the energy starts to flow through the output (led).</p></div><div class="step step-level-1" step="8" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="12800" data-y="0" data-z="0"><h1 id="joulethief-6">Joulethief</h1><img src="./assets/images/joulethief_5.png"></img><p>The inductor is now powered by the magnetic field of the coil.</p></div><div class="step step-level-1" step="9" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="14400" data-y="0" data-z="0"><h1 id="joulethief-7">Joulethief</h1><img src="./assets/images/joulethief_6.png"></img><p>When the magnetic field is gone, the whole process <a href="#joulethief-step1">starts over</a>.</p></div><div class="step step-level-1" step="10" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="16000" data-y="0" data-z="0"><h1 id="joulethief-8">Joulethief</h1><p>A more detailed explanation can be found on <a href="https://www.instructables.com/Joule-Thief-Circuit-How-to-Make-and-Circuit-Explan/">instructables</a></p></div><div class="step step-level-1" step="11" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="17600" data-y="0" data-z="0"><img src="./assets/images/circuit.png"></img></div><div class="step step-level-1" step="12" data-rotate-x="0" data-rotate-y="0" data-rotate-z="0" data-scale="1" data-x="19200" data-y="0" data-z="0"><p><a href="https://github.com/hackersanddesigners/Soilpunk_joulethief">https://github.com/hackersanddesigners/Soilpunk_joulethief</a></p></div></div><script type="text/javascript" src="js/impress.js"></script><script type="text/javascript" src="js/gotoSlide.js"></script><script type="text/javascript" src="js/hovercraft.js"></script></body></html>
\ No newline at end of file
diff --git a/html_output/js/gotoSlide.js b/html_output/js/gotoSlide.js
new file mode 100644
index 0000000..2c40231
--- /dev/null
+++ b/html_output/js/gotoSlide.js
@@ -0,0 +1,51 @@
+/**
+ * gotoSlide.js
+ *
+ * An impress.js plugin to move to a specific slide number
+ *
+ * MIT Licensed, see license.txt.
+ *
+ * Copyright 2012-2017 impress-console contributors (see README.txt)
+ *
+ */
+
+(function ( document, window ) {
+
+    var gotoSlide = function (event) {
+        var target = event.view.prompt("Enter slide number or id");
+
+        if (isNaN(target)) {
+            var goto_status = impress().goto(target);
+        } else if (target === null) {
+            return;
+        } else {
+            // goto(0) goes to step-1, so substract
+            var goto_status = impress().goto(parseInt(target) - 1);
+        }
+        if (goto_status === false) {
+            event.view.alert("Slide not found: '" + target + "'");
+        }
+    };
+
+    document.addEventListener( "impress:init", function( event ) {
+        var api = event.detail.api;
+        var util = api.lib.util;
+
+
+        document.addEventListener( "keyup", function( event ) {
+
+            if ( event.keyCode === 71 ) { // "g"
+                event.preventDefault();
+                gotoSlide( event );
+            }
+        }, false );
+
+        util.triggerEvent( document, "impress:help:add",
+                           {command: "G",
+                            text: "Go to slide",
+                            row: 3 }
+        );
+
+    });
+
+})(document, window);
diff --git a/html_output/js/hovercraft.js b/html_output/js/hovercraft.js
new file mode 100644
index 0000000..c6cee9f
--- /dev/null
+++ b/html_output/js/hovercraft.js
@@ -0,0 +1,37 @@
+// Main hovercraft js file
+( function( document ) {
+    "use strict";
+
+    document.addEventListener( "impress:init", function( event ) {
+
+        var api = event.detail.api;
+        var util = api.lib.util;
+
+
+        // Set up the help-box
+        // Overwrite the default navigation help
+        util.triggerEvent( document, "impress:help:add", { command: "Left, Down, Page Down, Space",
+                                                           text: "Next step",
+                                                           row: 1 } );
+        util.triggerEvent( document, "impress:help:add", { command: "Right, Up, Page Up",
+                                                           text: "Previous step",
+                                                           row: 2 } );
+    });
+
+    // Initialize impress.js
+    impress().init();
+
+    var impressattrs = document.getElementById('impress').attributes;
+    if (impressattrs.hasOwnProperty('auto-console') && impressattrs['auto-console'].value.toLowerCase() === 'true') {
+        impressConsole().open();
+    }
+
+}) (document);
+
+
+// Function updating the slide number counter
+function update_slide_number(evt)
+{
+    var step = evt.target.attributes['step'].value;
+    document.getElementById('slide-number').innerText = parseInt(step) + 1;
+}
diff --git a/html_output/js/impress.js b/html_output/js/impress.js
new file mode 100644
index 0000000..cdb44d9
--- /dev/null
+++ b/html_output/js/impress.js
@@ -0,0 +1,3908 @@
+// This file was automatically generated from files in src/ directory.
+
+/**
+ * impress.js
+ *
+ * impress.js is a presentation tool based on the power of CSS3 transforms and transitions
+ * in modern browsers and inspired by the idea behind prezi.com.
+ *
+ *
+ * Copyright 2011-2012 Bartek Szopka (@bartaz), 2016-2018 Henrik Ingo (@henrikingo)
+ *
+ * Released under the MIT and GPL Licenses.
+ *
+ * ------------------------------------------------
+ *  author:  Bartek Szopka, Henrik Ingo
+ *  version: 1.0.0
+ *  url:     http://impress.js.org
+ *  source:  http://github.com/impress/impress.js/
+ */
+
+// You are one of those who like to know how things work inside?
+// Let me show you the cogs that make impress.js run...
+( function( document, window ) {
+    "use strict";
+    var lib;
+
+    // HELPER FUNCTIONS
+
+    // `pfx` is a function that takes a standard CSS property name as a parameter
+    // and returns it's prefixed version valid for current browser it runs in.
+    // The code is heavily inspired by Modernizr http://www.modernizr.com/
+    var pfx = ( function() {
+
+        var style = document.createElement( "dummy" ).style,
+            prefixes = "Webkit Moz O ms Khtml".split( " " ),
+            memory = {};
+
+        return function( prop ) {
+            if ( typeof memory[ prop ] === "undefined" ) {
+
+                var ucProp  = prop.charAt( 0 ).toUpperCase() + prop.substr( 1 ),
+                    props   = ( prop + " " + prefixes.join( ucProp + " " ) + ucProp ).split( " " );
+
+                memory[ prop ] = null;
+                for ( var i in props ) {
+                    if ( style[ props[ i ] ] !== undefined ) {
+                        memory[ prop ] = props[ i ];
+                        break;
+                    }
+                }
+
+            }
+
+            return memory[ prop ];
+        };
+
+    } )();
+
+    var validateOrder = function( order, fallback ) {
+        var validChars = "xyz";
+        var returnStr = "";
+        if ( typeof order === "string" ) {
+            for ( var i in order.split( "" ) ) {
+                if ( validChars.indexOf( order[ i ] ) >= 0 ) {
+                    returnStr += order[ i ];
+
+                    // Each of x,y,z can be used only once.
+                    validChars = validChars.split( order[ i ] ).join( "" );
+                }
+            }
+        }
+        if ( returnStr ) {
+            return returnStr;
+        } else if ( fallback !== undefined ) {
+            return fallback;
+        } else {
+            return "xyz";
+        }
+    };
+
+    // `css` function applies the styles given in `props` object to the element
+    // given as `el`. It runs all property names through `pfx` function to make
+    // sure proper prefixed version of the property is used.
+    var css = function( el, props ) {
+        var key, pkey;
+        for ( key in props ) {
+            if ( props.hasOwnProperty( key ) ) {
+                pkey = pfx( key );
+                if ( pkey !== null ) {
+                    el.style[ pkey ] = props[ key ];
+                }
+            }
+        }
+        return el;
+    };
+
+    // `translate` builds a translate transform string for given data.
+    var translate = function( t ) {
+        return " translate3d(" + t.x + "px," + t.y + "px," + t.z + "px) ";
+    };
+
+    // `rotate` builds a rotate transform string for given data.
+    // By default the rotations are in X Y Z order that can be reverted by passing `true`
+    // as second parameter.
+    var rotate = function( r, revert ) {
+        var order = r.order ? r.order : "xyz";
+        var css = "";
+        var axes = order.split( "" );
+        if ( revert ) {
+            axes = axes.reverse();
+        }
+
+        for ( var i = 0; i < axes.length; i++ ) {
+            css += " rotate" + axes[ i ].toUpperCase() + "(" + r[ axes[ i ] ] + "deg)";
+        }
+        return css;
+    };
+
+    // `scale` builds a scale transform string for given data.
+    var scale = function( s ) {
+        return " scale(" + s + ") ";
+    };
+
+    // `computeWindowScale` counts the scale factor between window size and size
+    // defined for the presentation in the config.
+    var computeWindowScale = function( config ) {
+        var hScale = window.innerHeight / config.height,
+            wScale = window.innerWidth / config.width,
+            scale = hScale > wScale ? wScale : hScale;
+
+        if ( config.maxScale && scale > config.maxScale ) {
+            scale = config.maxScale;
+        }
+
+        if ( config.minScale && scale < config.minScale ) {
+            scale = config.minScale;
+        }
+
+        return scale;
+    };
+
+    // CHECK SUPPORT
+    var body = document.body;
+    var impressSupported =
+
+                          // Browser should support CSS 3D transtorms
+                           ( pfx( "perspective" ) !== null ) &&
+
+                          // And `classList` and `dataset` APIs
+                           ( body.classList ) &&
+                           ( body.dataset );
+
+    if ( !impressSupported ) {
+
+        // We can't be sure that `classList` is supported
+        body.className += " impress-not-supported ";
+    }
+
+    // GLOBALS AND DEFAULTS
+
+    // This is where the root elements of all impress.js instances will be kept.
+    // Yes, this means you can have more than one instance on a page, but I'm not
+    // sure if it makes any sense in practice ;)
+    var roots = {};
+
+    var preInitPlugins = [];
+    var preStepLeavePlugins = [];
+
+    // Some default config values.
+    var defaults = {
+        width: 1024,
+        height: 768,
+        maxScale: 1,
+        minScale: 0,
+
+        perspective: 1000,
+
+        transitionDuration: 1000
+    };
+
+    // It's just an empty function ... and a useless comment.
+    var empty = function() { return false; };
+
+    // IMPRESS.JS API
+
+    // And that's where interesting things will start to happen.
+    // It's the core `impress` function that returns the impress.js API
+    // for a presentation based on the element with given id ("impress"
+    // by default).
+    var impress = window.impress = function( rootId ) {
+
+        // If impress.js is not supported by the browser return a dummy API
+        // it may not be a perfect solution but we return early and avoid
+        // running code that may use features not implemented in the browser.
+        if ( !impressSupported ) {
+            return {
+                init: empty,
+                goto: empty,
+                prev: empty,
+                next: empty,
+                swipe: empty,
+                tear: empty,
+                lib: {}
+            };
+        }
+
+        rootId = rootId || "impress";
+
+        // If given root is already initialized just return the API
+        if ( roots[ "impress-root-" + rootId ] ) {
+            return roots[ "impress-root-" + rootId ];
+        }
+
+        // The gc library depends on being initialized before we do any changes to DOM.
+        lib = initLibraries( rootId );
+
+        body.classList.remove( "impress-not-supported" );
+        body.classList.add( "impress-supported" );
+
+        // Data of all presentation steps
+        var stepsData = {};
+
+        // Element of currently active step
+        var activeStep = null;
+
+        // Current state (position, rotation and scale) of the presentation
+        var currentState = null;
+
+        // Array of step elements
+        var steps = null;
+
+        // Configuration options
+        var config = null;
+
+        // Scale factor of the browser window
+        var windowScale = null;
+
+        // Root presentation elements
+        var root = lib.util.byId( rootId );
+        var canvas = document.createElement( "div" );
+
+        var initialized = false;
+
+        // STEP EVENTS
+        //
+        // There are currently two step events triggered by impress.js
+        // `impress:stepenter` is triggered when the step is shown on the
+        // screen (the transition from the previous one is finished) and
+        // `impress:stepleave` is triggered when the step is left (the
+        // transition to next step just starts).
+
+        // Reference to last entered step
+        var lastEntered = null;
+
+        // `onStepEnter` is called whenever the step element is entered
+        // but the event is triggered only if the step is different than
+        // last entered step.
+        // We sometimes call `goto`, and therefore `onStepEnter`, just to redraw a step, such as
+        // after screen resize. In this case - more precisely, in any case - we trigger a
+        // `impress:steprefresh` event.
+        var onStepEnter = function( step ) {
+            if ( lastEntered !== step ) {
+                lib.util.triggerEvent( step, "impress:stepenter" );
+                lastEntered = step;
+            }
+            lib.util.triggerEvent( step, "impress:steprefresh" );
+        };
+
+        // `onStepLeave` is called whenever the currentStep element is left
+        // but the event is triggered only if the currentStep is the same as
+        // lastEntered step.
+        var onStepLeave = function( currentStep, nextStep ) {
+            if ( lastEntered === currentStep ) {
+                lib.util.triggerEvent( currentStep, "impress:stepleave", { next: nextStep } );
+                lastEntered = null;
+            }
+        };
+
+        // `initStep` initializes given step element by reading data from its
+        // data attributes and setting correct styles.
+        var initStep = function( el, idx ) {
+            var data = el.dataset,
+                step = {
+                    translate: {
+                        x: lib.util.toNumber( data.x ),
+                        y: lib.util.toNumber( data.y ),
+                        z: lib.util.toNumber( data.z )
+                    },
+                    rotate: {
+                        x: lib.util.toNumber( data.rotateX ),
+                        y: lib.util.toNumber( data.rotateY ),
+                        z: lib.util.toNumber( data.rotateZ || data.rotate ),
+                        order: validateOrder( data.rotateOrder )
+                    },
+                    scale: lib.util.toNumber( data.scale, 1 ),
+                    transitionDuration: lib.util.toNumber(
+                        data.transitionDuration, config.transitionDuration
+                    ),
+                    el: el
+                };
+
+            if ( !el.id ) {
+                el.id = "step-" + ( idx + 1 );
+            }
+
+            stepsData[ "impress-" + el.id ] = step;
+
+            css( el, {
+                position: "absolute",
+                transform: "translate(-50%,-50%)" +
+                           translate( step.translate ) +
+                           rotate( step.rotate ) +
+                           scale( step.scale ),
+                transformStyle: "preserve-3d"
+            } );
+        };
+
+        // Initialize all steps.
+        // Read the data-* attributes, store in internal stepsData, and render with CSS.
+        var initAllSteps = function() {
+            steps = lib.util.$$( ".step", root );
+            steps.forEach( initStep );
+        };
+
+        // `init` API function that initializes (and runs) the presentation.
+        var init = function() {
+            if ( initialized ) { return; }
+            execPreInitPlugins( root );
+
+            // First we set up the viewport for mobile devices.
+            // For some reason iPad goes nuts when it is not done properly.
+            var meta = lib.util.$( "meta[name='viewport']" ) || document.createElement( "meta" );
+            meta.content = "width=device-width, minimum-scale=1, maximum-scale=1, user-scalable=no";
+            if ( meta.parentNode !== document.head ) {
+                meta.name = "viewport";
+                document.head.appendChild( meta );
+            }
+
+            // Initialize configuration object
+            var rootData = root.dataset;
+            config = {
+                width: lib.util.toNumber( rootData.width, defaults.width ),
+                height: lib.util.toNumber( rootData.height, defaults.height ),
+                maxScale: lib.util.toNumber( rootData.maxScale, defaults.maxScale ),
+                minScale: lib.util.toNumber( rootData.minScale, defaults.minScale ),
+                perspective: lib.util.toNumber( rootData.perspective, defaults.perspective ),
+                transitionDuration: lib.util.toNumber(
+                    rootData.transitionDuration, defaults.transitionDuration
+                )
+            };
+
+            windowScale = computeWindowScale( config );
+
+            // Wrap steps with "canvas" element
+            lib.util.arrayify( root.childNodes ).forEach( function( el ) {
+                canvas.appendChild( el );
+            } );
+            root.appendChild( canvas );
+
+            // Set initial styles
+            document.documentElement.style.height = "100%";
+
+            css( body, {
+                height: "100%",
+                overflow: "hidden"
+            } );
+
+            var rootStyles = {
+                position: "absolute",
+                transformOrigin: "top left",
+                transition: "all 0s ease-in-out",
+                transformStyle: "preserve-3d"
+            };
+
+            css( root, rootStyles );
+            css( root, {
+                top: "50%",
+                left: "50%",
+                perspective: ( config.perspective / windowScale ) + "px",
+                transform: scale( windowScale )
+            } );
+            css( canvas, rootStyles );
+
+            body.classList.remove( "impress-disabled" );
+            body.classList.add( "impress-enabled" );
+
+            // Get and init steps
+            initAllSteps();
+
+            // Set a default initial state of the canvas
+            currentState = {
+                translate: { x: 0, y: 0, z: 0 },
+                rotate:    { x: 0, y: 0, z: 0, order: "xyz" },
+                scale:     1
+            };
+
+            initialized = true;
+
+            lib.util.triggerEvent( root, "impress:init",
+                                   { api: roots[ "impress-root-" + rootId ] } );
+        };
+
+        // `getStep` is a helper function that returns a step element defined by parameter.
+        // If a number is given, step with index given by the number is returned, if a string
+        // is given step element with such id is returned, if DOM element is given it is returned
+        // if it is a correct step element.
+        var getStep = function( step ) {
+            if ( typeof step === "number" ) {
+                step = step < 0 ? steps[ steps.length + step ] : steps[ step ];
+            } else if ( typeof step === "string" ) {
+                step = lib.util.byId( step );
+            }
+            return ( step && step.id && stepsData[ "impress-" + step.id ] ) ? step : null;
+        };
+
+        // Used to reset timeout for `impress:stepenter` event
+        var stepEnterTimeout = null;
+
+        // `goto` API function that moves to step given as `el` parameter (by index, id or element).
+        // `duration` optionally given as second parameter, is the transition duration in css.
+        // `reason` is the string "next", "prev" or "goto" (default) and will be made available to
+        // preStepLeave plugins.
+        // `origEvent` may contain event that caused the call to goto, such as a key press event
+        var goto = function( el, duration, reason, origEvent ) {
+            reason = reason || "goto";
+            origEvent = origEvent || null;
+
+            if ( !initialized ) {
+                return false;
+            }
+
+            // Re-execute initAllSteps for each transition. This allows to edit step attributes
+            // dynamically, such as change their coordinates, or even remove or add steps, and have
+            // that change apply when goto() is called.
+            initAllSteps();
+
+            if ( !( el = getStep( el ) ) ) {
+                return false;
+            }
+
+            // Sometimes it's possible to trigger focus on first link with some keyboard action.
+            // Browser in such a case tries to scroll the page to make this element visible
+            // (even that body overflow is set to hidden) and it breaks our careful positioning.
+            //
+            // So, as a lousy (and lazy) workaround we will make the page scroll back to the top
+            // whenever slide is selected
+            //
+            // If you are reading this and know any better way to handle it, I'll be glad to hear
+            // about it!
+            window.scrollTo( 0, 0 );
+
+            var step = stepsData[ "impress-" + el.id ];
+            duration = ( duration !== undefined ? duration : step.transitionDuration );
+
+            // If we are in fact moving to another step, start with executing the registered
+            // preStepLeave plugins.
+            if ( activeStep && activeStep !== el ) {
+                var event = { target: activeStep, detail: {} };
+                event.detail.next = el;
+                event.detail.transitionDuration = duration;
+                event.detail.reason = reason;
+                if ( origEvent ) {
+                    event.origEvent = origEvent;
+                }
+
+                if ( execPreStepLeavePlugins( event ) === false ) {
+
+                    // PreStepLeave plugins are allowed to abort the transition altogether, by
+                    // returning false.
+                    // see stop and substep plugins for an example of doing just that
+                    return false;
+                }
+
+                // Plugins are allowed to change the detail values
+                el = event.detail.next;
+                step = stepsData[ "impress-" + el.id ];
+                duration = event.detail.transitionDuration;
+            }
+
+            if ( activeStep ) {
+                activeStep.classList.remove( "active" );
+                body.classList.remove( "impress-on-" + activeStep.id );
+            }
+            el.classList.add( "active" );
+
+            body.classList.add( "impress-on-" + el.id );
+
+            // Compute target state of the canvas based on given step
+            var target = {
+                rotate: {
+                    x: -step.rotate.x,
+                    y: -step.rotate.y,
+                    z: -step.rotate.z,
+                    order: step.rotate.order
+                },
+                translate: {
+                    x: -step.translate.x,
+                    y: -step.translate.y,
+                    z: -step.translate.z
+                },
+                scale: 1 / step.scale
+            };
+
+            // Check if the transition is zooming in or not.
+            //
+            // This information is used to alter the transition style:
+            // when we are zooming in - we start with move and rotate transition
+            // and the scaling is delayed, but when we are zooming out we start
+            // with scaling down and move and rotation are delayed.
+            var zoomin = target.scale >= currentState.scale;
+
+            duration = lib.util.toNumber( duration, config.transitionDuration );
+            var delay = ( duration / 2 );
+
+            // If the same step is re-selected, force computing window scaling,
+            // because it is likely to be caused by window resize
+            if ( el === activeStep ) {
+                windowScale = computeWindowScale( config );
+            }
+
+            var targetScale = target.scale * windowScale;
+
+            // Trigger leave of currently active element (if it's not the same step again)
+            if ( activeStep && activeStep !== el ) {
+                onStepLeave( activeStep, el );
+            }
+
+            // Now we alter transforms of `root` and `canvas` to trigger transitions.
+            //
+            // And here is why there are two elements: `root` and `canvas` - they are
+            // being animated separately:
+            // `root` is used for scaling and `canvas` for translate and rotations.
+            // Transitions on them are triggered with different delays (to make
+            // visually nice and "natural" looking transitions), so we need to know
+            // that both of them are finished.
+            css( root, {
+
+                // To keep the perspective look similar for different scales
+                // we need to "scale" the perspective, too
+                // For IE 11 support we must specify perspective independent
+                // of transform.
+                perspective: ( config.perspective / targetScale ) + "px",
+                transform: scale( targetScale ),
+                transitionDuration: duration + "ms",
+                transitionDelay: ( zoomin ? delay : 0 ) + "ms"
+            } );
+
+            css( canvas, {
+                transform: rotate( target.rotate, true ) + translate( target.translate ),
+                transitionDuration: duration + "ms",
+                transitionDelay: ( zoomin ? 0 : delay ) + "ms"
+            } );
+
+            // Here is a tricky part...
+            //
+            // If there is no change in scale or no change in rotation and translation, it means
+            // there was actually no delay - because there was no transition on `root` or `canvas`
+            // elements. We want to trigger `impress:stepenter` event in the correct moment, so
+            // here we compare the current and target values to check if delay should be taken into
+            // account.
+            //
+            // I know that this `if` statement looks scary, but it's pretty simple when you know
+            // what is going on - it's simply comparing all the values.
+            if ( currentState.scale === target.scale ||
+                ( currentState.rotate.x === target.rotate.x &&
+                  currentState.rotate.y === target.rotate.y &&
+                  currentState.rotate.z === target.rotate.z &&
+                  currentState.translate.x === target.translate.x &&
+                  currentState.translate.y === target.translate.y &&
+                  currentState.translate.z === target.translate.z ) ) {
+                delay = 0;
+            }
+
+            // Store current state
+            currentState = target;
+            activeStep = el;
+
+            // And here is where we trigger `impress:stepenter` event.
+            // We simply set up a timeout to fire it taking transition duration (and possible delay)
+            // into account.
+            //
+            // I really wanted to make it in more elegant way. The `transitionend` event seemed to
+            // be the best way to do it, but the fact that I'm using transitions on two separate
+            // elements and that the `transitionend` event is only triggered when there was a
+            // transition (change in the values) caused some bugs and made the code really
+            // complicated, cause I had to handle all the conditions separately. And it still
+            // needed a `setTimeout` fallback for the situations when there is no transition at all.
+            // So I decided that I'd rather make the code simpler than use shiny new
+            // `transitionend`.
+            //
+            // If you want learn something interesting and see how it was done with `transitionend`
+            // go back to version 0.5.2 of impress.js:
+            // http://github.com/bartaz/impress.js/blob/0.5.2/js/impress.js
+            window.clearTimeout( stepEnterTimeout );
+            stepEnterTimeout = window.setTimeout( function() {
+                onStepEnter( activeStep );
+            }, duration + delay );
+
+            return el;
+        };
+
+        // `prev` API function goes to previous step (in document order)
+        // `event` is optional, may contain the event that caused the need to call prev()
+        var prev = function( origEvent ) {
+            var prev = steps.indexOf( activeStep ) - 1;
+            prev = prev >= 0 ? steps[ prev ] : steps[ steps.length - 1 ];
+
+            return goto( prev, undefined, "prev", origEvent );
+        };
+
+        // `next` API function goes to next step (in document order)
+        // `event` is optional, may contain the event that caused the need to call next()
+        var next = function( origEvent ) {
+            var next = steps.indexOf( activeStep ) + 1;
+            next = next < steps.length ? steps[ next ] : steps[ 0 ];
+
+            return goto( next, undefined, "next", origEvent );
+        };
+
+        // Swipe for touch devices by @and3rson.
+        // Below we extend the api to control the animation between the currently
+        // active step and a presumed next/prev step. See touch plugin for
+        // an example of using this api.
+
+        // Helper function
+        var interpolate = function( a, b, k ) {
+            return a + ( b - a ) * k;
+        };
+
+        // Animate a swipe.
+        //
+        // Pct is a value between -1.0 and +1.0, designating the current length
+        // of the swipe.
+        //
+        // If pct is negative, swipe towards the next() step, if positive,
+        // towards the prev() step.
+        //
+        // Note that pre-stepleave plugins such as goto can mess with what is a
+        // next() and prev() step, so we need to trigger the pre-stepleave event
+        // here, even if a swipe doesn't guarantee that the transition will
+        // actually happen.
+        //
+        // Calling swipe(), with any value of pct, won't in itself cause a
+        // transition to happen, this is just to animate the swipe. Once the
+        // transition is committed - such as at a touchend event - caller is
+        // responsible for also calling prev()/next() as appropriate.
+        //
+        // Note: For now, this function is made available to be used by the swipe plugin (which
+        // is the UI counterpart to this). It is a semi-internal API and intentionally not
+        // documented in DOCUMENTATION.md.
+        var swipe = function( pct ) {
+            if ( Math.abs( pct ) > 1 ) {
+                return;
+            }
+
+            // Prepare & execute the preStepLeave event
+            var event = { target: activeStep, detail: {} };
+            event.detail.swipe = pct;
+
+            // Will be ignored within swipe animation, but just in case a plugin wants to read this,
+            // humor them
+            event.detail.transitionDuration = config.transitionDuration;
+            var idx; // Needed by jshint
+            if ( pct < 0 ) {
+                idx = steps.indexOf( activeStep ) + 1;
+                event.detail.next = idx < steps.length ? steps[ idx ] : steps[ 0 ];
+                event.detail.reason = "next";
+            } else if ( pct > 0 ) {
+                idx = steps.indexOf( activeStep ) - 1;
+                event.detail.next = idx >= 0 ? steps[ idx ] : steps[ steps.length - 1 ];
+                event.detail.reason = "prev";
+            } else {
+
+                // No move
+                return;
+            }
+            if ( execPreStepLeavePlugins( event ) === false ) {
+
+                // If a preStepLeave plugin wants to abort the transition, don't animate a swipe
+                // For stop, this is probably ok. For substep, the plugin it self might want to do
+                // some animation, but that's not the current implementation.
+                return false;
+            }
+            var nextElement = event.detail.next;
+
+            var nextStep = stepsData[ "impress-" + nextElement.id ];
+
+            // If the same step is re-selected, force computing window scaling,
+            var nextScale = nextStep.scale * windowScale;
+            var k = Math.abs( pct );
+
+            var interpolatedStep = {
+                translate: {
+                    x: interpolate( currentState.translate.x, -nextStep.translate.x, k ),
+                    y: interpolate( currentState.translate.y, -nextStep.translate.y, k ),
+                    z: interpolate( currentState.translate.z, -nextStep.translate.z, k )
+                },
+                rotate: {
+                    x: interpolate( currentState.rotate.x, -nextStep.rotate.x, k ),
+                    y: interpolate( currentState.rotate.y, -nextStep.rotate.y, k ),
+                    z: interpolate( currentState.rotate.z, -nextStep.rotate.z, k ),
+
+                    // Unfortunately there's a discontinuity if rotation order changes. Nothing I
+                    // can do about it?
+                    order: k < 0.7 ? currentState.rotate.order : nextStep.rotate.order
+                },
+                scale: interpolate( currentState.scale, nextScale, k )
+            };
+
+            css( root, {
+
+                // To keep the perspective look similar for different scales
+                // we need to 'scale' the perspective, too
+                perspective: config.perspective / interpolatedStep.scale + "px",
+                transform: scale( interpolatedStep.scale ),
+                transitionDuration: "0ms",
+                transitionDelay: "0ms"
+            } );
+
+            css( canvas, {
+                transform: rotate( interpolatedStep.rotate, true ) +
+                           translate( interpolatedStep.translate ),
+                transitionDuration: "0ms",
+                transitionDelay: "0ms"
+            } );
+        };
+
+        // Teardown impress
+        // Resets the DOM to the state it was before impress().init() was called.
+        // (If you called impress(rootId).init() for multiple different rootId's, then you must
+        // also call tear() once for each of them.)
+        var tear = function() {
+            lib.gc.teardown();
+            delete roots[ "impress-root-" + rootId ];
+        };
+
+        // Adding some useful classes to step elements.
+        //
+        // All the steps that have not been shown yet are given `future` class.
+        // When the step is entered the `future` class is removed and the `present`
+        // class is given. When the step is left `present` class is replaced with
+        // `past` class.
+        //
+        // So every step element is always in one of three possible states:
+        // `future`, `present` and `past`.
+        //
+        // There classes can be used in CSS to style different types of steps.
+        // For example the `present` class can be used to trigger some custom
+        // animations when step is shown.
+        lib.gc.addEventListener( root, "impress:init", function() {
+
+            // STEP CLASSES
+            steps.forEach( function( step ) {
+                step.classList.add( "future" );
+            } );
+
+            lib.gc.addEventListener( root, "impress:stepenter", function( event ) {
+                event.target.classList.remove( "past" );
+                event.target.classList.remove( "future" );
+                event.target.classList.add( "present" );
+            }, false );
+
+            lib.gc.addEventListener( root, "impress:stepleave", function( event ) {
+                event.target.classList.remove( "present" );
+                event.target.classList.add( "past" );
+            }, false );
+
+        }, false );
+
+        // Adding hash change support.
+        lib.gc.addEventListener( root, "impress:init", function() {
+
+            // Last hash detected
+            var lastHash = "";
+
+            // `#/step-id` is used instead of `#step-id` to prevent default browser
+            // scrolling to element in hash.
+            //
+            // And it has to be set after animation finishes, because in Chrome it
+            // makes transtion laggy.
+            // BUG: http://code.google.com/p/chromium/issues/detail?id=62820
+            lib.gc.addEventListener( root, "impress:stepenter", function( event ) {
+                window.location.hash = lastHash = "#/" + event.target.id;
+            }, false );
+
+            lib.gc.addEventListener( window, "hashchange", function() {
+
+                // When the step is entered hash in the location is updated
+                // (just few lines above from here), so the hash change is
+                // triggered and we would call `goto` again on the same element.
+                //
+                // To avoid this we store last entered hash and compare.
+                if ( window.location.hash !== lastHash ) {
+                    goto( lib.util.getElementFromHash() );
+                }
+            }, false );
+
+            // START
+            // by selecting step defined in url or first step of the presentation
+            goto( lib.util.getElementFromHash() || steps[ 0 ], 0 );
+        }, false );
+
+        body.classList.add( "impress-disabled" );
+
+        // Store and return API for given impress.js root element
+        return ( roots[ "impress-root-" + rootId ] = {
+            init: init,
+            goto: goto,
+            next: next,
+            prev: prev,
+            swipe: swipe,
+            tear: tear,
+            lib: lib
+        } );
+
+    };
+
+    // Flag that can be used in JS to check if browser have passed the support test
+    impress.supported = impressSupported;
+
+    // ADD and INIT LIBRARIES
+    // Library factories are defined in src/lib/*.js, and register themselves by calling
+    // impress.addLibraryFactory(libraryFactoryObject). They're stored here, and used to augment
+    // the API with library functions when client calls impress(rootId).
+    // See src/lib/README.md for clearer example.
+    // (Advanced usage: For different values of rootId, a different instance of the libaries are
+    // generated, in case they need to hold different state for different root elements.)
+    var libraryFactories = {};
+    impress.addLibraryFactory = function( obj ) {
+        for ( var libname in obj ) {
+            if ( obj.hasOwnProperty( libname ) ) {
+                libraryFactories[ libname ] = obj[ libname ];
+            }
+        }
+    };
+
+    // Call each library factory, and return the lib object that is added to the api.
+    var initLibraries = function( rootId ) { //jshint ignore:line
+        var lib = {};
+        for ( var libname in libraryFactories ) {
+            if ( libraryFactories.hasOwnProperty( libname ) ) {
+                if ( lib[ libname ] !== undefined ) {
+                    throw "impress.js ERROR: Two libraries both tried to use libname: " +  libname;
+                }
+                lib[ libname ] = libraryFactories[ libname ]( rootId );
+            }
+        }
+        return lib;
+    };
+
+    // `addPreInitPlugin` allows plugins to register a function that should
+    // be run (synchronously) at the beginning of init, before
+    // impress().init() itself executes.
+    impress.addPreInitPlugin = function( plugin, weight ) {
+        weight = parseInt( weight ) || 10;
+        if ( weight <= 0 ) {
+            throw "addPreInitPlugin: weight must be a positive integer";
+        }
+
+        if ( preInitPlugins[ weight ] === undefined ) {
+            preInitPlugins[ weight ] = [];
+        }
+        preInitPlugins[ weight ].push( plugin );
+    };
+
+    // Called at beginning of init, to execute all pre-init plugins.
+    var execPreInitPlugins = function( root ) { //jshint ignore:line
+        for ( var i = 0; i < preInitPlugins.length; i++ ) {
+            var thisLevel = preInitPlugins[ i ];
+            if ( thisLevel !== undefined ) {
+                for ( var j = 0; j < thisLevel.length; j++ ) {
+                    thisLevel[ j ]( root );
+                }
+            }
+        }
+    };
+
+    // `addPreStepLeavePlugin` allows plugins to register a function that should
+    // be run (synchronously) at the beginning of goto()
+    impress.addPreStepLeavePlugin = function( plugin, weight ) { //jshint ignore:line
+        weight = parseInt( weight ) || 10;
+        if ( weight <= 0 ) {
+            throw "addPreStepLeavePlugin: weight must be a positive integer";
+        }
+
+        if ( preStepLeavePlugins[ weight ] === undefined ) {
+            preStepLeavePlugins[ weight ] = [];
+        }
+        preStepLeavePlugins[ weight ].push( plugin );
+    };
+
+    // Called at beginning of goto(), to execute all preStepLeave plugins.
+    var execPreStepLeavePlugins = function( event ) { //jshint ignore:line
+        for ( var i = 0; i < preStepLeavePlugins.length; i++ ) {
+            var thisLevel = preStepLeavePlugins[ i ];
+            if ( thisLevel !== undefined ) {
+                for ( var j = 0; j < thisLevel.length; j++ ) {
+                    if ( thisLevel[ j ]( event ) === false ) {
+
+                        // If a plugin returns false, the stepleave event (and related transition)
+                        // is aborted
+                        return false;
+                    }
+                }
+            }
+        }
+    };
+
+} )( document, window );
+
+// THAT'S ALL FOLKS!
+//
+// Thanks for reading it all.
+// Or thanks for scrolling down and reading the last part.
+//
+// I've learnt a lot when building impress.js and I hope this code and comments
+// will help somebody learn at least some part of it.
+
+/**
+ * Garbage collection utility
+ *
+ * This library allows plugins to add elements and event listeners they add to the DOM. The user
+ * can call `impress().lib.gc.teardown()` to cause all of them to be removed from DOM, so that
+ * the document is in the state it was before calling `impress().init()`.
+ *
+ * In addition to just adding elements and event listeners to the garbage collector, plugins
+ * can also register callback functions to do arbitrary cleanup upon teardown.
+ *
+ * Henrik Ingo (c) 2016
+ * MIT License
+ */
+
+( function( document, window ) {
+    "use strict";
+    var roots = [];
+    var rootsCount = 0;
+    var startingState = { roots: [] };
+
+    var libraryFactory = function( rootId ) {
+        if ( roots[ rootId ] ) {
+            return roots[ rootId ];
+        }
+
+        // Per root global variables (instance variables?)
+        var elementList = [];
+        var eventListenerList = [];
+        var callbackList = [];
+
+        recordStartingState( rootId );
+
+        // LIBRARY FUNCTIONS
+        // Definitions of the library functions we return as an object at the end
+
+        // `pushElement` adds a DOM element to the gc stack
+        var pushElement = function( element ) {
+            elementList.push( element );
+        };
+
+        // `appendChild` is a convenience wrapper that combines DOM appendChild with gc.pushElement
+        var appendChild = function( parent, element ) {
+            parent.appendChild( element );
+            pushElement( element );
+        };
+
+        // `pushEventListener` adds an event listener to the gc stack
+        var pushEventListener = function( target, type, listenerFunction ) {
+            eventListenerList.push( { target:target, type:type, listener:listenerFunction } );
+        };
+
+        // `addEventListener` combines DOM addEventListener with gc.pushEventListener
+        var addEventListener = function( target, type, listenerFunction ) {
+            target.addEventListener( type, listenerFunction );
+            pushEventListener( target, type, listenerFunction );
+        };
+
+        // `pushCallback` If the above utilities are not enough, plugins can add their own callback
+        // function to do arbitrary things.
+        var pushCallback = function( callback ) {
+            callbackList.push( callback );
+        };
+        pushCallback( function( rootId ) { resetStartingState( rootId ); } );
+
+        // `teardown` will
+        // - execute all callbacks in LIFO order
+        // - call `removeChild` on all DOM elements in LIFO order
+        // - call `removeEventListener` on all event listeners in LIFO order
+        // The goal of a teardown is to return to the same state that the DOM was before
+        // `impress().init()` was called.
+        var teardown = function() {
+
+            // Execute the callbacks in LIFO order
+            var i; // Needed by jshint
+            for ( i = callbackList.length - 1; i >= 0; i-- ) {
+                callbackList[ i ]( rootId );
+            }
+            callbackList = [];
+            for ( i = 0; i < elementList.length; i++ ) {
+                elementList[ i ].parentElement.removeChild( elementList[ i ] );
+            }
+            elementList = [];
+            for ( i = 0; i < eventListenerList.length; i++ ) {
+                var target   = eventListenerList[ i ].target;
+                var type     = eventListenerList[ i ].type;
+                var listener = eventListenerList[ i ].listener;
+                target.removeEventListener( type, listener );
+            }
+        };
+
+        var lib = {
+            pushElement: pushElement,
+            appendChild: appendChild,
+            pushEventListener: pushEventListener,
+            addEventListener: addEventListener,
+            pushCallback: pushCallback,
+            teardown: teardown
+        };
+        roots[ rootId ] = lib;
+        rootsCount++;
+        return lib;
+    };
+
+    // Let impress core know about the existence of this library
+    window.impress.addLibraryFactory( { gc: libraryFactory } );
+
+    // CORE INIT
+    // The library factory (gc(rootId)) is called at the beginning of impress(rootId).init()
+    // For the purposes of teardown(), we can use this as an opportunity to save the state
+    // of a few things in the DOM in their virgin state, before impress().init() did anything.
+    // Note: These could also be recorded by the code in impress.js core as these values
+    // are changed, but in an effort to not deviate too much from upstream, I'm adding
+    // them here rather than the core itself.
+    var recordStartingState = function( rootId ) {
+        startingState.roots[ rootId ] = {};
+        startingState.roots[ rootId ].steps = [];
+
+        // Record whether the steps have an id or not
+        var steps = document.getElementById( rootId ).querySelectorAll( ".step" );
+        for ( var i = 0; i < steps.length; i++ ) {
+            var el = steps[ i ];
+            startingState.roots[ rootId ].steps.push( {
+                el: el,
+                id: el.getAttribute( "id" )
+            } );
+        }
+
+        // In the rare case of multiple roots, the following is changed on first init() and
+        // reset at last tear().
+        if ( rootsCount === 0 ) {
+            startingState.body = {};
+
+            // It is customary for authors to set body.class="impress-not-supported" as a starting
+            // value, which can then be removed by impress().init(). But it is not required.
+            // Remember whether it was there or not.
+            if ( document.body.classList.contains( "impress-not-supported" ) ) {
+                startingState.body.impressNotSupported = true;
+            } else {
+                startingState.body.impressNotSupported = false;
+            }
+
+            // If there's a <meta name="viewport"> element, its contents will be overwritten by init
+            var metas = document.head.querySelectorAll( "meta" );
+            for ( i = 0; i < metas.length; i++ ) {
+                var m = metas[ i ];
+                if ( m.name === "viewport" ) {
+                    startingState.meta = m.content;
+                }
+            }
+        }
+    };
+
+    // CORE TEARDOWN
+    var resetStartingState = function( rootId ) {
+
+        // Reset body element
+        document.body.classList.remove( "impress-enabled" );
+        document.body.classList.remove( "impress-disabled" );
+
+        var root = document.getElementById( rootId );
+        var activeId = root.querySelector( ".active" ).id;
+        document.body.classList.remove( "impress-on-" + activeId );
+
+        document.documentElement.style.height = "";
+        document.body.style.height = "";
+        document.body.style.overflow = "";
+
+        // Remove style values from the root and step elements
+        // Note: We remove the ones set by impress.js core. Otoh, we didn't preserve any original
+        // values. A more sophisticated implementation could keep track of original values and then
+        // reset those.
+        var steps = root.querySelectorAll( ".step" );
+        for ( var i = 0; i < steps.length; i++ ) {
+            steps[ i ].classList.remove( "future" );
+            steps[ i ].classList.remove( "past" );
+            steps[ i ].classList.remove( "present" );
+            steps[ i ].classList.remove( "active" );
+            steps[ i ].style.position = "";
+            steps[ i ].style.transform = "";
+            steps[ i ].style[ "transform-style" ] = "";
+        }
+        root.style.position = "";
+        root.style[ "transform-origin" ] = "";
+        root.style.transition = "";
+        root.style[ "transform-style" ] = "";
+        root.style.top = "";
+        root.style.left = "";
+        root.style.transform = "";
+
+        // Reset id of steps ("step-1" id's are auto generated)
+        steps = startingState.roots[ rootId ].steps;
+        var step;
+        while ( step = steps.pop() ) {
+            if ( step.id === null ) {
+                step.el.removeAttribute( "id" );
+            } else {
+                step.el.setAttribute( "id", step.id );
+            }
+        }
+        delete startingState.roots[ rootId ];
+
+        // Move step div elements away from canvas, then delete canvas
+        // Note: There's an implicit assumption here that the canvas div is the only child element
+        // of the root div. If there would be something else, it's gonna be lost.
+        var canvas = root.firstChild;
+        var canvasHTML = canvas.innerHTML;
+        root.innerHTML = canvasHTML;
+
+        if ( roots[ rootId ] !== undefined ) {
+            delete roots[ rootId ];
+            rootsCount--;
+        }
+        if ( rootsCount === 0 ) {
+
+            // In the rare case that more than one impress root elements were initialized, these
+            // are only reset when all are uninitialized.
+            document.body.classList.remove( "impress-supported" );
+            if ( startingState.body.impressNotSupported ) {
+                document.body.classList.add( "impress-not-supported" );
+            }
+
+            // We need to remove or reset the meta element inserted by impress.js
+            var metas = document.head.querySelectorAll( "meta" );
+            for ( i = 0; i < metas.length; i++ ) {
+                var m = metas[ i ];
+                if ( m.name === "viewport" ) {
+                    if ( startingState.meta !== undefined ) {
+                        m.content = startingState.meta;
+                    } else {
+                        m.parentElement.removeChild( m );
+                    }
+                }
+            }
+        }
+
+    };
+
+} )( document, window );
+
+/**
+ * Common utility functions
+ *
+ * Copyright 2011-2012 Bartek Szopka (@bartaz)
+ * Henrik Ingo (c) 2016
+ * MIT License
+ */
+
+( function( document, window ) {
+    "use strict";
+    var roots = [];
+
+    var libraryFactory = function( rootId ) {
+        if ( roots[ rootId ] ) {
+            return roots[ rootId ];
+        }
+
+        // `$` returns first element for given CSS `selector` in the `context` of
+        // the given element or whole document.
+        var $ = function( selector, context ) {
+            context = context || document;
+            return context.querySelector( selector );
+        };
+
+        // `$$` return an array of elements for given CSS `selector` in the `context` of
+        // the given element or whole document.
+        var $$ = function( selector, context ) {
+            context = context || document;
+            return arrayify( context.querySelectorAll( selector ) );
+        };
+
+        // `arrayify` takes an array-like object and turns it into real Array
+        // to make all the Array.prototype goodness available.
+        var arrayify = function( a ) {
+            return [].slice.call( a );
+        };
+
+        // `byId` returns element with given `id` - you probably have guessed that ;)
+        var byId = function( id ) {
+            return document.getElementById( id );
+        };
+
+        // `getElementFromHash` returns an element located by id from hash part of
+        // window location.
+        var getElementFromHash = function() {
+
+            // Get id from url # by removing `#` or `#/` from the beginning,
+            // so both "fallback" `#slide-id` and "enhanced" `#/slide-id` will work
+            return byId( window.location.hash.replace( /^#\/?/, "" ) );
+        };
+
+        // Throttling function calls, by Remy Sharp
+        // http://remysharp.com/2010/07/21/throttling-function-calls/
+        var throttle = function( fn, delay ) {
+            var timer = null;
+            return function() {
+                var context = this, args = arguments;
+                window.clearTimeout( timer );
+                timer = window.setTimeout( function() {
+                    fn.apply( context, args );
+                }, delay );
+            };
+        };
+
+        // `toNumber` takes a value given as `numeric` parameter and tries to turn
+        // it into a number. If it is not possible it returns 0 (or other value
+        // given as `fallback`).
+        var toNumber = function( numeric, fallback ) {
+            return isNaN( numeric ) ? ( fallback || 0 ) : Number( numeric );
+        };
+
+        // `triggerEvent` builds a custom DOM event with given `eventName` and `detail` data
+        // and triggers it on element given as `el`.
+        var triggerEvent = function( el, eventName, detail ) {
+            var event = document.createEvent( "CustomEvent" );
+            event.initCustomEvent( eventName, true, true, detail );
+            el.dispatchEvent( event );
+        };
+
+        var lib = {
+            $: $,
+            $$: $$,
+            arrayify: arrayify,
+            byId: byId,
+            getElementFromHash: getElementFromHash,
+            throttle: throttle,
+            toNumber: toNumber,
+            triggerEvent: triggerEvent
+        };
+        roots[ rootId ] = lib;
+        return lib;
+    };
+
+    // Let impress core know about the existence of this library
+    window.impress.addLibraryFactory( { util: libraryFactory } );
+
+} )( document, window );
+
+/**
+ * Autoplay plugin - Automatically advance slideshow after N seconds
+ *
+ * Copyright 2016 Henrik Ingo, henrik.ingo@avoinelama.fi
+ * Released under the MIT license.
+ */
+/* global clearTimeout, setTimeout, document */
+
+( function( document ) {
+    "use strict";
+
+    var autoplayDefault = 0;
+    var currentStepTimeout = 0;
+    var api = null;
+    var timeoutHandle = null;
+    var root = null;
+    var util;
+
+    // On impress:init, check whether there is a default setting, as well as
+    // handle step-1.
+    document.addEventListener( "impress:init", function( event ) {
+        util = event.detail.api.lib.util;
+
+        // Getting API from event data instead of global impress().init().
+        // You don't even need to know what is the id of the root element
+        // or anything. `impress:init` event data gives you everything you
+        // need to control the presentation that was just initialized.
+        api = event.detail.api;
+        root = event.target;
+
+        // Element attributes starting with "data-", become available under
+        // element.dataset. In addition hyphenized words become camelCased.
+        var data = root.dataset;
+
+        if ( data.autoplay ) {
+            autoplayDefault = util.toNumber( data.autoplay, 0 );
+        }
+
+        var toolbar = document.querySelector( "#impress-toolbar" );
+        if ( toolbar ) {
+            addToolbarButton( toolbar );
+        }
+
+        api.lib.gc.pushCallback( function() {
+            clearTimeout( timeoutHandle );
+        } );
+
+        // Note that right after impress:init event, also impress:stepenter is
+        // triggered for the first slide, so that's where code flow continues.
+    }, false );
+
+    // If default autoplay time was defined in the presentation root, or
+    // in this step, set timeout.
+    var reloadTimeout = function( event ) {
+        var step = event.target;
+        currentStepTimeout = util.toNumber( step.dataset.autoplay, autoplayDefault );
+        if ( status === "paused" ) {
+            setAutoplayTimeout( 0 );
+        } else {
+            setAutoplayTimeout( currentStepTimeout );
+        }
+    };
+
+    document.addEventListener( "impress:stepenter", function( event ) {
+        reloadTimeout( event );
+    }, false );
+
+    document.addEventListener( "impress:substep:stepleaveaborted", function( event ) {
+        reloadTimeout( event );
+    }, false );
+
+    /**
+     * Set timeout after which we move to next() step.
+     */
+    var setAutoplayTimeout = function( timeout ) {
+        if ( timeoutHandle ) {
+            clearTimeout( timeoutHandle );
+        }
+
+        if ( timeout > 0 ) {
+            timeoutHandle = setTimeout( function() { api.next(); }, timeout * 1000 );
+        }
+        setButtonText();
+    };
+
+    /*** Toolbar plugin integration *******************************************/
+    var status = "not clicked";
+    var toolbarButton = null;
+
+    // Copied from core impress.js. Good candidate for moving to a utilities collection.
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( "CustomEvent" );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    var makeDomElement = function( html ) {
+        var tempDiv = document.createElement( "div" );
+        tempDiv.innerHTML = html;
+        return tempDiv.firstChild;
+    };
+
+    var toggleStatus = function() {
+        if ( currentStepTimeout > 0 && status !== "paused" ) {
+            status = "paused";
+        } else {
+            status = "playing";
+        }
+    };
+
+    var getButtonText = function() {
+        if ( currentStepTimeout > 0 && status !== "paused" ) {
+            return "||"; // Pause
+        } else {
+            return "&#9654;"; // Play
+        }
+    };
+
+    var setButtonText = function() {
+        if ( toolbarButton ) {
+
+            // Keep button size the same even if label content is changing
+            var buttonWidth = toolbarButton.offsetWidth;
+            var buttonHeight = toolbarButton.offsetHeight;
+            toolbarButton.innerHTML = getButtonText();
+            if ( !toolbarButton.style.width ) {
+                toolbarButton.style.width = buttonWidth + "px";
+            }
+            if ( !toolbarButton.style.height ) {
+                toolbarButton.style.height = buttonHeight + "px";
+            }
+        }
+    };
+
+    var addToolbarButton = function( toolbar ) {
+        var html = '<button id="impress-autoplay-playpause" ' + // jshint ignore:line
+                   'title="Autoplay" class="impress-autoplay">' + // jshint ignore:line
+                   getButtonText() + "</button>"; // jshint ignore:line
+        toolbarButton = makeDomElement( html );
+        toolbarButton.addEventListener( "click", function() {
+            toggleStatus();
+            if ( status === "playing" ) {
+                if ( autoplayDefault === 0 ) {
+                    autoplayDefault = 7;
+                }
+                if ( currentStepTimeout === 0 ) {
+                    currentStepTimeout = autoplayDefault;
+                }
+                setAutoplayTimeout( currentStepTimeout );
+            } else if ( status === "paused" ) {
+                setAutoplayTimeout( 0 );
+            }
+        } );
+
+        triggerEvent( toolbar, "impress:toolbar:appendChild",
+                      { group: 10, element: toolbarButton } );
+    };
+
+} )( document );
+
+/**
+ * Blackout plugin
+ *
+ * Press Ctrl+b to hide all slides, and Ctrl+b again to show them.
+ * Also navigating to a different slide will show them again (impress:stepleave).
+ *
+ * Copyright 2014 @Strikeskids
+ * Released under the MIT license.
+ */
+/* global document */
+
+( function( document ) {
+    "use strict";
+
+    var canvas = null;
+    var blackedOut = false;
+
+    // While waiting for a shared library of utilities, copying these 2 from main impress.js
+    var css = function( el, props ) {
+        var key, pkey;
+        for ( key in props ) {
+            if ( props.hasOwnProperty( key ) ) {
+                pkey = pfx( key );
+                if ( pkey !== null ) {
+                    el.style[ pkey ] = props[ key ];
+                }
+            }
+        }
+        return el;
+    };
+
+    var pfx = ( function() {
+
+        var style = document.createElement( "dummy" ).style,
+            prefixes = "Webkit Moz O ms Khtml".split( " " ),
+            memory = {};
+
+        return function( prop ) {
+            if ( typeof memory[ prop ] === "undefined" ) {
+
+                var ucProp  = prop.charAt( 0 ).toUpperCase() + prop.substr( 1 ),
+                    props   = ( prop + " " + prefixes.join( ucProp + " " ) + ucProp ).split( " " );
+
+                memory[ prop ] = null;
+                for ( var i in props ) {
+                    if ( style[ props[ i ] ] !== undefined ) {
+                        memory[ prop ] = props[ i ];
+                        break;
+                    }
+                }
+
+            }
+
+            return memory[ prop ];
+        };
+
+    } )();
+
+    var removeBlackout = function() {
+        if ( blackedOut ) {
+            css( canvas, {
+                display: "block"
+            } );
+            blackedOut = false;
+        }
+    };
+
+    var blackout = function() {
+        if ( blackedOut ) {
+            removeBlackout();
+        } else {
+            css( canvas, {
+                display: ( blackedOut = !blackedOut ) ? "none" : "block"
+            } );
+            blackedOut = true;
+        }
+    };
+
+    // Wait for impress.js to be initialized
+    document.addEventListener( "impress:init", function( event ) {
+        var api = event.detail.api;
+        var root = event.target;
+        canvas = root.firstElementChild;
+        var gc = api.lib.gc;
+
+        gc.addEventListener( document, "keydown", function( event ) {
+            if ( event.keyCode === 66 ) {
+                event.preventDefault();
+                if ( !blackedOut ) {
+                    blackout();
+                } else {
+                    removeBlackout();
+                }
+            }
+        }, false );
+
+        gc.addEventListener( document, "keyup", function( event ) {
+            if ( event.keyCode === 66 ) {
+                event.preventDefault();
+            }
+        }, false );
+
+    }, false );
+
+    document.addEventListener( "impress:stepleave", function() {
+        removeBlackout();
+    }, false );
+
+} )( document );
+
+
+/**
+ * Extras Plugin
+ *
+ * This plugin performs initialization (like calling mermaid.initialize())
+ * for the extras/ plugins if they are loaded into a presentation.
+ *
+ * See README.md for details.
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global markdown, hljs, mermaid, impress, document, window */
+
+( function( document, window ) {
+    "use strict";
+
+    var preInit = function() {
+        if ( window.markdown ) {
+
+            // Unlike the other extras, Markdown.js doesn't by default do anything in
+            // particular. We do it ourselves here.
+            // In addition, we use "-----" as a delimiter for new slide.
+
+            // Query all .markdown elements and translate to HTML
+            var markdownDivs = document.querySelectorAll( ".markdown" );
+            for ( var idx = 0; idx < markdownDivs.length; idx++ ) {
+              var element = markdownDivs[ idx ];
+
+              var slides = element.textContent.split( /^-----$/m );
+              var i = slides.length - 1;
+              element.innerHTML = markdown.toHTML( slides[ i ] );
+
+              // If there's an id, unset it for last, and all other, elements,
+              // and then set it for the first.
+              var id = null;
+              if ( element.id ) {
+                id = element.id;
+                element.id = "";
+              }
+              i--;
+              while ( i >= 0 ) {
+                var newElement = element.cloneNode( false );
+                newElement.innerHTML = markdown.toHTML( slides[ i ] );
+                element.parentNode.insertBefore( newElement, element );
+                element = newElement;
+                i--;
+              }
+              if ( id !== null ) {
+                element.id = id;
+              }
+            }
+        } // Markdown
+
+        if ( window.hljs ) {
+            hljs.initHighlightingOnLoad();
+        }
+
+        if ( window.mermaid ) {
+            mermaid.initialize( { startOnLoad:true } );
+        }
+    };
+
+    // Register the plugin to be called in pre-init phase
+    // Note: Markdown.js should run early/first, because it creates new div elements.
+    // So add this with a lower-than-default weight.
+    impress.addPreInitPlugin( preInit, 1 );
+
+} )( document, window );
+
+
+/**
+ * Form support
+ *
+ * Functionality to better support use of input, textarea, button... elements in a presentation.
+ *
+ * This plugin does two things:
+ *
+ * Set stopPropagation on any element that might take text input. This allows users to type, for
+ * example, the letter 'P' into a form field, without causing the presenter console to spring up.
+ *
+ * On impress:stepleave, de-focus any potentially active
+ * element. This is to prevent the focus from being left in a form element that is no longer visible
+ * in the window, and user therefore typing garbage into the form.
+ *
+ * TODO: Currently it is not possible to use TAB to navigate between form elements. Impress.js, and
+ * in particular the navigation plugin, unfortunately must fully take control of the tab key,
+ * otherwise a user could cause the browser to scroll to a link or button that's not on the current
+ * step. However, it could be possible to allow tab navigation between form elements, as long as
+ * they are on the active step. This is a topic for further study.
+ *
+ * Copyright 2016 Henrik Ingo
+ * MIT License
+ */
+/* global document */
+( function( document ) {
+    "use strict";
+    var root;
+    var api;
+
+    document.addEventListener( "impress:init", function( event ) {
+        root = event.target;
+        api = event.detail.api;
+        var gc = api.lib.gc;
+
+        var selectors = [ "input[type=text]", "textarea", "select", "[contenteditable=true]" ];
+        for ( var selector of selectors ) {
+            var elements = document.querySelectorAll( selector );
+            if ( !elements ) {
+                continue;
+            }
+
+            for ( var i = 0; i < elements.length; i++ ) {
+                var e = elements[ i ];
+                gc.addEventListener( e, "keydown", function( event ) {
+                    event.stopPropagation();
+                } );
+                gc.addEventListener( e, "keyup", function( event ) {
+                    event.stopPropagation();
+                } );
+            }
+        }
+    }, false );
+
+    document.addEventListener( "impress:stepleave", function() {
+        document.activeElement.blur();
+    }, false );
+
+} )( document );
+
+
+/**
+ * Goto Plugin
+ *
+ * The goto plugin is a pre-stepleave plugin. It is executed before impress:stepleave,
+ * and will alter the destination where to transition next.
+ *
+ * Example:
+ *
+ *         <!-- When leaving this step, go directly to "step-5" -->
+ *         <div class="step" data-goto="step-5">
+ *
+ *         <!-- When leaving this step with next(), go directly to "step-5", instead of next step.
+ *              If moving backwards to previous step - e.g. prev() instead of next() -
+ *              then go to "step-1". -->
+ *         <div class="step" data-goto-next="step-5" data-goto-prev="step-1">
+ *
+ *        <!-- data-goto-key-list and data-goto-next-list allow you to build advanced non-linear
+ *             navigation. -->
+ *        <div class="step"
+ *             data-goto-key-list="ArrowUp ArrowDown ArrowRight ArrowLeft"
+ *             data-goto-next-list="step-4 step-3 step-2 step-5">
+ *
+ * See https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values for a table
+ * of what strings to use for each key.
+ *
+ * Copyright 2016-2017 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global window, document, impress */
+
+( function( document, window ) {
+    "use strict";
+    var lib;
+
+    document.addEventListener( "impress:init", function( event ) {
+        lib = event.detail.api.lib;
+    }, false );
+
+    var isNumber = function( numeric ) {
+        return !isNaN( numeric );
+    };
+
+    var goto = function( event ) {
+        if ( ( !event ) || ( !event.target ) ) {
+            return;
+        }
+
+        var data = event.target.dataset;
+        var steps = document.querySelectorAll( ".step" );
+
+        // Data-goto-key-list="" & data-goto-next-list="" //////////////////////////////////////////
+        if ( data.gotoKeyList !== undefined &&
+             data.gotoNextList !== undefined &&
+             event.origEvent !== undefined &&
+             event.origEvent.key !== undefined ) {
+            var keylist = data.gotoKeyList.split( " " );
+            var nextlist = data.gotoNextList.split( " " );
+
+            if ( keylist.length !== nextlist.length ) {
+                window.console.log(
+                    "impress goto plugin: data-goto-key-list and data-goto-next-list don't match:"
+                );
+                window.console.log( keylist );
+                window.console.log( nextlist );
+
+                // Don't return, allow the other categories to work despite this error
+            } else {
+                var index = keylist.indexOf( event.origEvent.key );
+                if ( index >= 0 ) {
+                    var next = nextlist[ index ];
+                    if ( isNumber( next ) ) {
+                        event.detail.next = steps[ next ];
+
+                        // If the new next element has its own transitionDuration, we're responsible
+                        // for setting that on the event as well
+                        event.detail.transitionDuration = lib.util.toNumber(
+                            event.detail.next.dataset.transitionDuration,
+                            event.detail.transitionDuration
+                        );
+                        return;
+                    } else {
+                        var newTarget = document.getElementById( next );
+                        if ( newTarget && newTarget.classList.contains( "step" ) ) {
+                            event.detail.next = newTarget;
+                            event.detail.transitionDuration = lib.util.toNumber(
+                                event.detail.next.dataset.transitionDuration,
+                                event.detail.transitionDuration
+                            );
+                            return;
+                        } else {
+                            window.console.log( "impress goto plugin: " + next +
+                                                " is not a step in this impress presentation." );
+                        }
+                    }
+                }
+            }
+        }
+
+        // Data-goto-next="" & data-goto-prev="" ///////////////////////////////////////////////////
+
+        // Handle event.target data-goto-next attribute
+        if ( isNumber( data.gotoNext ) && event.detail.reason === "next" ) {
+            event.detail.next = steps[ data.gotoNext ];
+
+            // If the new next element has its own transitionDuration, we're responsible for setting
+            // that on the event as well
+            event.detail.transitionDuration = lib.util.toNumber(
+                event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+            );
+            return;
+        }
+        if ( data.gotoNext && event.detail.reason === "next" ) {
+            var newTarget = document.getElementById( data.gotoNext ); // jshint ignore:line
+            if ( newTarget && newTarget.classList.contains( "step" ) ) {
+                event.detail.next = newTarget;
+                event.detail.transitionDuration = lib.util.toNumber(
+                    event.detail.next.dataset.transitionDuration,
+                    event.detail.transitionDuration
+                );
+                return;
+            } else {
+                window.console.log( "impress goto plugin: " + data.gotoNext +
+                                    " is not a step in this impress presentation." );
+            }
+        }
+
+        // Handle event.target data-goto-prev attribute
+        if ( isNumber( data.gotoPrev ) && event.detail.reason === "prev" ) {
+            event.detail.next = steps[ data.gotoPrev ];
+            event.detail.transitionDuration = lib.util.toNumber(
+                event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+            );
+            return;
+        }
+        if ( data.gotoPrev && event.detail.reason === "prev" ) {
+            var newTarget = document.getElementById( data.gotoPrev ); // jshint ignore:line
+            if ( newTarget && newTarget.classList.contains( "step" ) ) {
+                event.detail.next = newTarget;
+                event.detail.transitionDuration = lib.util.toNumber(
+                    event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+                );
+                return;
+            } else {
+                window.console.log( "impress goto plugin: " + data.gotoPrev +
+                                    " is not a step in this impress presentation." );
+            }
+        }
+
+        // Data-goto="" ///////////////////////////////////////////////////////////////////////////
+
+        // Handle event.target data-goto attribute
+        if ( isNumber( data.goto ) ) {
+            event.detail.next = steps[ data.goto ];
+            event.detail.transitionDuration = lib.util.toNumber(
+                event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+            );
+            return;
+        }
+        if ( data.goto ) {
+            var newTarget = document.getElementById( data.goto ); // jshint ignore:line
+            if ( newTarget && newTarget.classList.contains( "step" ) ) {
+                event.detail.next = newTarget;
+                event.detail.transitionDuration = lib.util.toNumber(
+                    event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+                );
+                return;
+            } else {
+                window.console.log( "impress goto plugin: " + data.goto +
+                                    " is not a step in this impress presentation." );
+            }
+        }
+    };
+
+    // Register the plugin to be called in pre-stepleave phase
+    impress.addPreStepLeavePlugin( goto );
+
+} )( document, window );
+
+
+/**
+ * Help popup plugin
+ *
+ * Example:
+ *
+ *     <!-- Show a help popup at start, or if user presses "H" -->
+ *     <div id="impress-help"></div>
+ *
+ * For developers:
+ *
+ * Typical use for this plugin, is for plugins that support some keypress, to add a line
+ * to the help popup produced by this plugin. For example "P: Presenter console".
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global window, document */
+
+( function( document, window ) {
+    "use strict";
+    var rows = [];
+    var timeoutHandle;
+
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( "CustomEvent" );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    var renderHelpDiv = function() {
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( helpDiv ) {
+            var html = [];
+            for ( var row in rows ) {
+                for ( var arrayItem in row ) {
+                    html.push( rows[ row ][ arrayItem ] );
+                }
+            }
+            if ( html ) {
+                helpDiv.innerHTML = "<table>\n" + html.join( "\n" ) + "</table>\n";
+            }
+        }
+    };
+
+    var toggleHelp = function() {
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( !helpDiv ) {
+            return;
+        }
+
+        if ( helpDiv.style.display === "block" ) {
+            helpDiv.style.display = "none";
+        } else {
+            helpDiv.style.display = "block";
+            window.clearTimeout( timeoutHandle );
+        }
+    };
+
+    document.addEventListener( "keyup", function( event ) {
+
+        if ( event.keyCode === 72 ) { // "h"
+            event.preventDefault();
+            toggleHelp();
+        }
+    }, false );
+
+    // API
+    // Other plugins can add help texts, typically if they support an action on a keypress.
+    /**
+     * Add a help text to the help popup.
+     *
+     * :param: e.detail.command  Example: "H"
+     * :param: e.detail.text     Example: "Show this help."
+     * :param: e.detail.row      Row index from 0 to 9 where to place this help text. Example: 0
+     */
+    document.addEventListener( "impress:help:add", function( e ) {
+
+        // The idea is for the sender of the event to supply a unique row index, used for sorting.
+        // But just in case two plugins would ever use the same row index, we wrap each row into
+        // its own array. If there are more than one entry for the same index, they are shown in
+        // first come, first serve ordering.
+        var rowIndex = e.detail.row;
+        if ( typeof rows[ rowIndex ] !== "object" || !rows[ rowIndex ].isArray ) {
+            rows[ rowIndex ] = [];
+        }
+        rows[ e.detail.row ].push( "<tr><td><strong>" + e.detail.command + "</strong></td><td>" +
+                                   e.detail.text + "</td></tr>" );
+        renderHelpDiv();
+    } );
+
+    document.addEventListener( "impress:init", function( e ) {
+        renderHelpDiv();
+
+        // At start, show the help for 7 seconds.
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( helpDiv ) {
+            helpDiv.style.display = "block";
+            timeoutHandle = window.setTimeout( function() {
+                var helpDiv = document.getElementById( "impress-help" );
+                helpDiv.style.display = "none";
+            }, 7000 );
+
+            // Regster callback to empty the help div on teardown
+            var api = e.detail.api;
+            api.lib.gc.pushCallback( function() {
+                window.clearTimeout( timeoutHandle );
+                helpDiv.style.display = "";
+                helpDiv.innerHTML = "";
+                rows = [];
+            } );
+        }
+
+        // Use our own API to register the help text for "h"
+        triggerEvent( document, "impress:help:add",
+                      { command: "H", text: "Show this help", row: 0 } );
+    } );
+
+} )( document, window );
+
+
+/**
+ * Adds a presenter console to impress.js
+ *
+ * MIT Licensed, see license.txt.
+ *
+ * Copyright 2012, 2013, 2015 impress-console contributors (see README.txt)
+ *
+ * version: 1.3-dev
+ *
+ */
+
+// This file contains so much HTML, that we will just respectfully disagree about js
+/* jshint quotmark:single */
+/* global navigator, top, setInterval, clearInterval, document, window */
+
+( function( document, window ) {
+    'use strict';
+
+    // TODO: Move this to src/lib/util.js
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( 'CustomEvent' );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    // Create Language object depending on browsers language setting
+    var lang;
+    switch ( navigator.language ) {
+    case 'de':
+        lang = {
+            'noNotes': '<div class="noNotes">Keine Notizen hierzu</div>',
+            'restart': 'Neustart',
+            'clickToOpen': 'Klicken um Sprecherkonsole zu öffnen',
+            'prev': 'zurück',
+            'next': 'weiter',
+            'loading': 'initalisiere',
+            'ready': 'Bereit',
+            'moving': 'in Bewegung',
+            'useAMPM': false
+        };
+        break;
+    case 'en': // jshint ignore:line
+    default : // jshint ignore:line
+        lang = {
+            'noNotes': '<div class="noNotes">No notes for this step</div>',
+            'restart': 'Restart',
+            'clickToOpen': 'Click to open speaker console',
+            'prev': 'Prev',
+            'next': 'Next',
+            'loading': 'Loading',
+            'ready': 'Ready',
+            'moving': 'Moving',
+            'useAMPM': false
+        };
+        break;
+    }
+
+    // Settings to set iframe in speaker console
+    const preViewDefaultFactor = 0.7;
+    const preViewMinimumFactor = 0.5;
+    const preViewGap    = 4;
+
+    // This is the default template for the speaker console window
+    const consoleTemplate = '<!DOCTYPE html>' +
+        '<html id="impressconsole"><head>' +
+
+          // Order is important: If user provides a cssFile, those will win, because they're later
+          '{{cssStyle}}' +
+          '{{cssLink}}' +
+        '</head><body>' +
+        '<div id="console">' +
+          '<div id="views">' +
+            '<iframe id="slideView" scrolling="no"></iframe>' +
+            '<iframe id="preView" scrolling="no"></iframe>' +
+            '<div id="blocker"></div>' +
+          '</div>' +
+          '<div id="notes"></div>' +
+        '</div>' +
+        '<div id="controls"> ' +
+          '<div id="prev"><a  href="#" onclick="impress().prev(); return false;" />' +
+            '{{prev}}</a></div>' +
+          '<div id="next"><a  href="#" onclick="impress().next(); return false;" />' +
+            '{{next}}</a></div>' +
+          '<div id="clock">--:--</div>' +
+          '<div id="timer" onclick="timerReset()">00m 00s</div>' +
+          '<div id="status">{{loading}}</div>' +
+        '</div>' +
+        '</body></html>';
+
+    // Default css location
+    var cssFileOldDefault = 'css/impressConsole.css';
+    var cssFile = undefined; // jshint ignore:line
+
+    // Css for styling iframs on the console
+    var cssFileIframeOldDefault = 'css/iframe.css';
+    var cssFileIframe = undefined; // jshint ignore:line
+
+    // All console windows, so that you can call impressConsole() repeatedly.
+    var allConsoles = {};
+
+    // Zero padding helper function:
+    var zeroPad = function( i ) {
+        return ( i < 10 ? '0' : '' ) + i;
+    };
+
+    // The console object
+    var impressConsole = window.impressConsole = function( rootId ) {
+
+        rootId = rootId || 'impress';
+
+        if ( allConsoles[ rootId ] ) {
+            return allConsoles[ rootId ];
+        }
+
+        // Root presentation elements
+        var root = document.getElementById( rootId );
+
+        var consoleWindow = null;
+
+        var nextStep = function() {
+            var classes = '';
+            var nextElement = document.querySelector( '.active' );
+
+            // Return to parents as long as there is no next sibling
+            while ( !nextElement.nextElementSibling && nextElement.parentNode ) {
+                nextElement = nextElement.parentNode;
+            }
+            nextElement = nextElement.nextElementSibling;
+            while ( nextElement ) {
+                classes = nextElement.attributes[ 'class' ];
+                if ( classes && classes.value.indexOf( 'step' ) !== -1 ) {
+                    consoleWindow.document.getElementById( 'blocker' ).innerHTML = lang.next;
+                    return nextElement;
+                }
+
+                if ( nextElement.firstElementChild ) { // First go into deep
+                    nextElement = nextElement.firstElementChild;
+                } else {
+
+                    // Go to next sibling or through parents until there is a next sibling
+                    while ( !nextElement.nextElementSibling && nextElement.parentNode ) {
+                        nextElement = nextElement.parentNode;
+                    }
+                    nextElement = nextElement.nextElementSibling;
+                }
+            }
+
+            // No next element. Pick the first
+            consoleWindow.document.getElementById( 'blocker' ).innerHTML = lang.restart;
+            return document.querySelector( '.step' );
+        };
+
+        // Sync the notes to the step
+        var onStepLeave = function() {
+            if ( consoleWindow ) {
+
+                // Set notes to next steps notes.
+                var newNotes = document.querySelector( '.active' ).querySelector( '.notes' );
+                if ( newNotes ) {
+                    newNotes = newNotes.innerHTML;
+                } else {
+                    newNotes = lang.noNotes;
+                }
+                consoleWindow.document.getElementById( 'notes' ).innerHTML = newNotes;
+
+                // Set the views
+                var baseURL = document.URL.substring( 0, document.URL.search( '#/' ) );
+                var slideSrc = baseURL + '#' + document.querySelector( '.active' ).id;
+                var preSrc = baseURL + '#' + nextStep().id;
+                var slideView = consoleWindow.document.getElementById( 'slideView' );
+
+                // Setting them when they are already set causes glithes in Firefox, so check first:
+                if ( slideView.src !== slideSrc ) {
+                    slideView.src = slideSrc;
+                }
+                var preView = consoleWindow.document.getElementById( 'preView' );
+                if ( preView.src !== preSrc ) {
+                    preView.src = preSrc;
+                }
+
+                consoleWindow.document.getElementById( 'status' ).innerHTML =
+                    '<span class="moving">' + lang.moving + '</span>';
+            }
+        };
+
+        // Sync the previews to the step
+        var onStepEnter = function() {
+            if ( consoleWindow ) {
+
+                // We do everything here again, because if you stopped the previos step to
+                // early, the onstepleave trigger is not called for that step, so
+                // we need this to sync things.
+                var newNotes = document.querySelector( '.active' ).querySelector( '.notes' );
+                if ( newNotes ) {
+                    newNotes = newNotes.innerHTML;
+                } else {
+                    newNotes = lang.noNotes;
+                }
+                var notes = consoleWindow.document.getElementById( 'notes' );
+                notes.innerHTML = newNotes;
+                notes.scrollTop = 0;
+
+                // Set the views
+                var baseURL = document.URL.substring( 0, document.URL.search( '#/' ) );
+                var slideSrc = baseURL + '#' + document.querySelector( '.active' ).id;
+                var preSrc = baseURL + '#' + nextStep().id;
+                var slideView = consoleWindow.document.getElementById( 'slideView' );
+
+                // Setting them when they are already set causes glithes in Firefox, so check first:
+                if ( slideView.src !== slideSrc ) {
+                    slideView.src = slideSrc;
+                }
+                var preView = consoleWindow.document.getElementById( 'preView' );
+                if ( preView.src !== preSrc ) {
+                    preView.src = preSrc;
+                }
+
+                consoleWindow.document.getElementById( 'status' ).innerHTML =
+                    '<span  class="ready">' + lang.ready + '</span>';
+            }
+        };
+
+        // Sync substeps
+        var onSubstep = function( event ) {
+            if ( consoleWindow ) {
+                if ( event.detail.reason === 'next' ) {
+                    onSubstepShow();
+                }
+                if ( event.detail.reason === 'prev' ) {
+                    onSubstepHide();
+                }
+            }
+        };
+
+        var onSubstepShow = function() {
+            var slideView = consoleWindow.document.getElementById( 'slideView' );
+            triggerEventInView( slideView, 'impress:substep:show' );
+        };
+
+        var onSubstepHide = function() {
+            var slideView = consoleWindow.document.getElementById( 'slideView' );
+            triggerEventInView( slideView, 'impress:substep:hide' );
+        };
+
+        var triggerEventInView = function( frame, eventName, detail ) {
+
+            // Note: Unfortunately Chrome does not allow createEvent on file:// URLs, so this won't
+            // work. This does work on Firefox, and should work if viewing the presentation on a
+            // http:// URL on Chrome.
+            var event = frame.contentDocument.createEvent( 'CustomEvent' );
+            event.initCustomEvent( eventName, true, true, detail );
+            frame.contentDocument.dispatchEvent( event );
+        };
+
+        var spaceHandler = function() {
+            var notes = consoleWindow.document.getElementById( 'notes' );
+            if ( notes.scrollTopMax - notes.scrollTop > 20 ) {
+               notes.scrollTop = notes.scrollTop + notes.clientHeight * 0.8;
+            } else {
+               window.impress().next();
+            }
+        };
+
+        var timerReset = function() {
+            consoleWindow.timerStart = new Date();
+        };
+
+        // Show a clock
+        var clockTick = function() {
+            var now = new Date();
+            var hours = now.getHours();
+            var minutes = now.getMinutes();
+            var seconds = now.getSeconds();
+            var ampm = '';
+
+            if ( lang.useAMPM ) {
+                ampm = ( hours < 12 ) ? 'AM' : 'PM';
+                hours = ( hours > 12 ) ? hours - 12 : hours;
+                hours = ( hours === 0 ) ? 12 : hours;
+            }
+
+            // Clock
+            var clockStr = zeroPad( hours ) + ':' + zeroPad( minutes ) + ':' + zeroPad( seconds ) +
+                           ' ' + ampm;
+            consoleWindow.document.getElementById( 'clock' ).firstChild.nodeValue = clockStr;
+
+            // Timer
+            seconds = Math.floor( ( now - consoleWindow.timerStart ) / 1000 );
+            minutes = Math.floor( seconds / 60 );
+            seconds = Math.floor( seconds % 60 );
+            consoleWindow.document.getElementById( 'timer' ).firstChild.nodeValue =
+                zeroPad( minutes ) + 'm ' + zeroPad( seconds ) + 's';
+
+            if ( !consoleWindow.initialized ) {
+
+                // Nudge the slide windows after load, or they will scrolled wrong on Firefox.
+                consoleWindow.document.getElementById( 'slideView' ).contentWindow.scrollTo( 0, 0 );
+                consoleWindow.document.getElementById( 'preView' ).contentWindow.scrollTo( 0, 0 );
+                consoleWindow.initialized = true;
+            }
+        };
+
+        var registerKeyEvent = function( keyCodes, handler, window ) {
+            if ( window === undefined ) {
+                window = consoleWindow;
+            }
+
+            // Prevent default keydown action when one of supported key is pressed
+            window.document.addEventListener( 'keydown', function( event ) {
+                if ( !event.ctrlKey && !event.altKey && !event.shiftKey && !event.metaKey &&
+                     keyCodes.indexOf( event.keyCode ) !== -1 ) {
+                    event.preventDefault();
+                }
+            }, false );
+
+            // Trigger impress action on keyup
+            window.document.addEventListener( 'keyup', function( event ) {
+                if ( !event.ctrlKey && !event.altKey && !event.shiftKey && !event.metaKey &&
+                     keyCodes.indexOf( event.keyCode ) !== -1 ) {
+                        handler();
+                        event.preventDefault();
+                }
+            }, false );
+        };
+
+        var consoleOnLoad = function() {
+                var slideView = consoleWindow.document.getElementById( 'slideView' );
+                var preView = consoleWindow.document.getElementById( 'preView' );
+
+                // Firefox:
+                slideView.contentDocument.body.classList.add( 'impress-console' );
+                preView.contentDocument.body.classList.add( 'impress-console' );
+                if ( cssFileIframe !== undefined ) {
+                    slideView.contentDocument.head.insertAdjacentHTML(
+                        'beforeend',
+                        '<link rel="stylesheet" type="text/css" href="' + cssFileIframe + '">'
+                    );
+                    preView.contentDocument.head.insertAdjacentHTML(
+                        'beforeend',
+                        '<link rel="stylesheet" type="text/css" href="' + cssFileIframe + '">'
+                    );
+                }
+
+                // Chrome:
+                slideView.addEventListener( 'load', function() {
+                        slideView.contentDocument.body.classList.add( 'impress-console' );
+                        if ( cssFileIframe !== undefined ) {
+                            slideView.contentDocument.head.insertAdjacentHTML(
+                                'beforeend',
+                                '<link rel="stylesheet" type="text/css" href="' +
+                                    cssFileIframe + '">'
+                            );
+                        }
+                } );
+                preView.addEventListener( 'load', function() {
+                        preView.contentDocument.body.classList.add( 'impress-console' );
+                        if ( cssFileIframe !== undefined ) {
+                            preView.contentDocument.head.insertAdjacentHTML(
+                                'beforeend',
+                                '<link rel="stylesheet" type="text/css" href="' +
+                                    cssFileIframe + '">' );
+                        }
+                } );
+        };
+
+        var open = function() {
+            if ( top.isconsoleWindow ) {
+                return;
+            }
+
+            if ( consoleWindow && !consoleWindow.closed ) {
+                consoleWindow.focus();
+            } else {
+                consoleWindow = window.open( '', 'impressConsole' );
+
+                // If opening failes this may be because the browser prevents this from
+                // not (or less) interactive JavaScript...
+                if ( consoleWindow == null ) {
+
+                    // ... so I add a button to klick.
+                    // workaround on firefox
+                    var message = document.createElement( 'div' );
+                    message.id = 'impress-console-button';
+                    message.style.position = 'fixed';
+                    message.style.left = 0;
+                    message.style.top = 0;
+                    message.style.right = 0;
+                    message.style.bottom = 0;
+                    message.style.backgroundColor = 'rgba(255, 255, 255, 0.9)';
+                    var clickStr = 'var x = document.getElementById(\'impress-console-button\');' +
+                                     'x.parentNode.removeChild(x);' +
+                                     'var r = document.getElementById(\'' + rootId + '\');' +
+                                     'impress(\'' + rootId +
+                                     '\').lib.util.triggerEvent(r, \'impress:console:open\', {})';
+                    var styleStr = 'margin: 25vh 25vw;width:50vw;height:50vh;';
+                    message.innerHTML = '<button style="' + styleStr + '" ' +
+                                                 'onclick="' + clickStr + '">' +
+                                        lang.clickToOpen +
+                                        '</button>';
+                    document.body.appendChild( message );
+                    return;
+                }
+
+                var cssLink = '';
+                if ( cssFile !== undefined ) {
+                    cssLink = '<link rel="stylesheet" type="text/css" media="screen" href="' +
+                              cssFile + '">';
+                }
+
+                // This sets the window location to the main window location, so css can be loaded:
+                consoleWindow.document.open();
+
+                // Write the template:
+                consoleWindow.document.write(
+
+                    // CssStyleStr is lots of inline <style></style> defined at the end of this file
+                    consoleTemplate.replace( '{{cssStyle}}', cssStyleStr() )
+                                   .replace( '{{cssLink}}', cssLink )
+                                   .replace( /{{.*?}}/gi, function( x ) {
+                                       return lang[ x.substring( 2, x.length - 2 ) ]; }
+                                   )
+                );
+                consoleWindow.document.title = 'Speaker Console (' + document.title + ')';
+                consoleWindow.impress = window.impress;
+
+                // We set this flag so we can detect it later, to prevent infinite popups.
+                consoleWindow.isconsoleWindow = true;
+
+                // Set the onload function:
+                consoleWindow.onload = consoleOnLoad;
+
+                // Add clock tick
+                consoleWindow.timerStart = new Date();
+                consoleWindow.timerReset = timerReset;
+                consoleWindow.clockInterval = setInterval( allConsoles[ rootId ].clockTick, 1000 );
+
+                // Keyboard navigation handlers
+                // 33: pg up, 37: left, 38: up
+                registerKeyEvent( [ 33, 37, 38 ], window.impress().prev );
+
+                // 34: pg down, 39: right, 40: down
+                registerKeyEvent( [ 34, 39, 40 ], window.impress().next );
+
+                // 32: space
+                registerKeyEvent( [ 32 ], spaceHandler );
+
+                // 82: R
+                registerKeyEvent( [ 82 ], timerReset );
+
+                // Cleanup
+                consoleWindow.onbeforeunload = function() {
+
+                    // I don't know why onunload doesn't work here.
+                    clearInterval( consoleWindow.clockInterval );
+                };
+
+                // It will need a little nudge on Firefox, but only after loading:
+                onStepEnter();
+                consoleWindow.initialized = false;
+                consoleWindow.document.close();
+
+                //Catch any window resize to pass size on
+                window.onresize = resize;
+                consoleWindow.onresize = resize;
+
+                return consoleWindow;
+            }
+        };
+
+        var resize = function() {
+            var slideView = consoleWindow.document.getElementById( 'slideView' );
+            var preView = consoleWindow.document.getElementById( 'preView' );
+
+            // Get ratio of presentation
+            var ratio = window.innerHeight / window.innerWidth;
+
+            // Get size available for views
+            var views = consoleWindow.document.getElementById( 'views' );
+
+            // SlideView may have a border or some padding:
+            // asuming same border width on both direktions
+            var delta = slideView.offsetWidth - slideView.clientWidth;
+
+            // Set views
+            var slideViewWidth = ( views.clientWidth - delta );
+            var slideViewHeight = Math.floor( slideViewWidth * ratio );
+
+            var preViewTop = slideViewHeight + preViewGap;
+
+            var preViewWidth = Math.floor( slideViewWidth * preViewDefaultFactor );
+            var preViewHeight = Math.floor( slideViewHeight * preViewDefaultFactor );
+
+            // Shrink preview to fit into space available
+            if ( views.clientHeight - delta < preViewTop + preViewHeight ) {
+                preViewHeight = views.clientHeight - delta - preViewTop;
+                preViewWidth = Math.floor( preViewHeight / ratio );
+            }
+
+            // If preview is not high enough forget ratios!
+            if ( preViewWidth <= Math.floor( slideViewWidth * preViewMinimumFactor ) ) {
+                slideViewWidth = ( views.clientWidth - delta );
+                slideViewHeight = Math.floor( ( views.clientHeight - delta - preViewGap ) /
+                                             ( 1 + preViewMinimumFactor ) );
+
+                preViewTop = slideViewHeight + preViewGap;
+
+                preViewWidth = Math.floor( slideViewWidth * preViewMinimumFactor );
+                preViewHeight = views.clientHeight - delta - preViewTop;
+            }
+
+            // Set the calculated into styles
+            slideView.style.width = slideViewWidth + 'px';
+            slideView.style.height = slideViewHeight + 'px';
+
+            preView.style.top = preViewTop + 'px';
+
+            preView.style.width = preViewWidth + 'px';
+            preView.style.height = preViewHeight + 'px';
+        };
+
+        var _init = function( cssConsole, cssIframe ) {
+            if ( cssConsole !== undefined ) {
+                cssFile = cssConsole;
+            }
+
+            // You can also specify the css in the presentation root div:
+            // <div id="impress" data-console-css=..." data-console-css-iframe="...">
+            else if ( root.dataset.consoleCss !== undefined ) {
+                cssFile = root.dataset.consoleCss;
+            }
+
+            if ( cssIframe !== undefined ) {
+                cssFileIframe = cssIframe;
+            } else if ( root.dataset.consoleCssIframe !== undefined ) {
+                cssFileIframe = root.dataset.consoleCssIframe;
+            }
+
+            // Register the event
+            root.addEventListener( 'impress:stepleave', onStepLeave );
+            root.addEventListener( 'impress:stepenter', onStepEnter );
+            root.addEventListener( 'impress:substep:stepleaveaborted', onSubstep );
+            root.addEventListener( 'impress:substep:show', onSubstepShow );
+            root.addEventListener( 'impress:substep:hide', onSubstepHide );
+
+            //When the window closes, clean up after ourselves.
+            window.onunload = function() {
+                if ( consoleWindow && !consoleWindow.closed ) {
+                    consoleWindow.close();
+                }
+            };
+
+            //Open speaker console when they press 'p'
+            registerKeyEvent( [ 80 ], open, window );
+
+            //Btw, you can also launch console automatically:
+            //<div id="impress" data-console-autolaunch="true">
+            if ( root.dataset.consoleAutolaunch === 'true' ) {
+                window.open();
+            }
+        };
+
+        var init = function( cssConsole, cssIframe ) {
+            if ( ( cssConsole === undefined || cssConsole === cssFileOldDefault ) &&
+                 ( cssIframe === undefined  || cssIframe === cssFileIframeOldDefault ) ) {
+                window.console.log( 'impressConsole().init() is deprecated. ' +
+                                   'impressConsole is now initialized automatically when you ' +
+                                   'call impress().init().' );
+            }
+            _init( cssConsole, cssIframe );
+        };
+
+        // New API for impress.js plugins is based on using events
+        root.addEventListener( 'impress:console:open', function() {
+            open();
+        } );
+
+        /**
+         * Register a key code to an event handler
+         *
+         * :param: event.detail.keyCodes    List of key codes
+         * :param: event.detail.handler     A function registered as the event handler
+         * :param: event.detail.window      The console window to register the keycode in
+         */
+        root.addEventListener( 'impress:console:registerKeyEvent', function( event ) {
+            registerKeyEvent( event.detail.keyCodes, event.detail.handler, event.detail.window );
+        } );
+
+        // Return the object
+        allConsoles[ rootId ] = { init: init, open: open, clockTick: clockTick,
+                               registerKeyEvent: registerKeyEvent, _init: _init };
+        return allConsoles[ rootId ];
+
+    };
+
+    // This initializes impressConsole automatically when initializing impress itself
+    document.addEventListener( 'impress:init', function( event ) {
+
+        // Note: impressConsole wants the id string, not the DOM element directly
+        impressConsole( event.target.id )._init();
+
+        // Add 'P' to the help popup
+        triggerEvent( document, 'impress:help:add',
+                        { command: 'P', text: 'Presenter console', row: 10 } );
+    } );
+
+    // Returns a string to be used inline as a css <style> element in the console window.
+    // Apologies for length, but hiding it here at the end to keep it away from rest of the code.
+    var cssStyleStr = function() {
+        return `<style>
+            #impressconsole body {
+                background-color: rgb(255, 255, 255);
+                padding: 0;
+                margin: 0;
+                font-family: verdana, arial, sans-serif;
+                font-size: 2vw;
+            }
+
+            #impressconsole div#console {
+                position: absolute;
+                top: 0.5vw;
+                left: 0.5vw;
+                right: 0.5vw;
+                bottom: 3vw;
+                margin: 0;
+            }
+
+            #impressconsole div#views, #impressconsole div#notes {
+                position: absolute;
+                top: 0;
+                bottom: 0;
+            }
+
+            #impressconsole div#views {
+                left: 0;
+                right: 50vw;
+                overflow: hidden;
+            }
+
+            #impressconsole div#blocker {
+                position: absolute;
+                right: 0;
+                bottom: 0;
+            }
+
+            #impressconsole div#notes {
+                left: 50vw;
+                right: 0;
+                overflow-x: hidden;
+                overflow-y: auto;
+                padding: 0.3ex;
+                background-color: rgb(255, 255, 255);
+                border: solid 1px rgb(120, 120, 120);
+            }
+
+            #impressconsole div#notes .noNotes {
+                color: rgb(200, 200, 200);
+            }
+
+            #impressconsole div#notes p {
+                margin-top: 0;
+            }
+
+            #impressconsole iframe {
+                position: absolute;
+                margin: 0;
+                padding: 0;
+                left: 0;
+                border: solid 1px rgb(120, 120, 120);
+            }
+
+            #impressconsole iframe#slideView {
+                top: 0;
+                width: 49vw;
+                height: 49vh;
+            }
+
+            #impressconsole iframe#preView {
+                opacity: 0.7;
+                top: 50vh;
+                width: 30vw;
+                height: 30vh;
+            }
+
+            #impressconsole div#controls {
+                margin: 0;
+                position: absolute;
+                bottom: 0.25vw;
+                left: 0.5vw;
+                right: 0.5vw;
+                height: 2.5vw;
+                background-color: rgb(255, 255, 255);
+                background-color: rgba(255, 255, 255, 0.6);
+            }
+
+            #impressconsole div#prev, div#next {
+            }
+
+            #impressconsole div#prev a, #impressconsole div#next a {
+                display: block;
+                border: solid 1px rgb(70, 70, 70);
+                border-radius: 0.5vw;
+                font-size: 1.5vw;
+                padding: 0.25vw;
+                text-decoration: none;
+                background-color: rgb(220, 220, 220);
+                color: rgb(0, 0, 0);
+            }
+
+            #impressconsole div#prev a:hover, #impressconsole div#next a:hover {
+                background-color: rgb(245, 245, 245);
+            }
+
+            #impressconsole div#prev {
+                float: left;
+            }
+
+            #impressconsole div#next {
+                float: right;
+            }
+
+            #impressconsole div#status {
+                margin-left: 2em;
+                margin-right: 2em;
+                text-align: center;
+                float: right;
+            }
+
+            #impressconsole div#clock {
+                margin-left: 2em;
+                margin-right: 2em;
+                text-align: center;
+                float: left;
+            }
+
+            #impressconsole div#timer {
+                margin-left: 2em;
+                margin-right: 2em;
+                text-align: center;
+                float: left;
+            }
+
+            #impressconsole span.moving {
+                color: rgb(255, 0, 0);
+            }
+
+            #impressconsole span.ready {
+                color: rgb(0, 128, 0);
+            }
+        </style>`;
+    };
+
+} )( document, window );
+
+/**
+ * Mobile devices support
+ *
+ * Allow presentation creators to hide all but 3 slides, to save resources, particularly on mobile
+ * devices, using classes body.impress-mobile, .step.prev, .step.active and .step.next.
+ *
+ * Note: This plugin does not take into account possible redirections done with skip, goto etc
+ * plugins. Basically it wouldn't work as intended in such cases, but the active step will at least
+ * be correct.
+ *
+ * Adapted to a plugin from a submission by @Kzeni:
+ * https://github.com/impress/impress.js/issues/333
+ */
+/* global document, navigator */
+( function( document ) {
+    "use strict";
+
+    var getNextStep = function( el ) {
+        var steps = document.querySelectorAll( ".step" );
+        for ( var i = 0; i < steps.length; i++ ) {
+            if ( steps[ i ] === el ) {
+                if ( i + 1 < steps.length ) {
+                    return steps[ i + 1 ];
+                } else {
+                    return steps[ 0 ];
+                }
+            }
+        }
+    };
+    var getPrevStep = function( el ) {
+        var steps = document.querySelectorAll( ".step" );
+        for ( var i = steps.length - 1; i >= 0; i-- ) {
+            if ( steps[ i ] === el ) {
+                if ( i - 1 >= 0 ) {
+                    return steps[ i - 1 ];
+                } else {
+                    return steps[ steps.length - 1 ];
+                }
+            }
+        }
+    };
+
+    // Detect mobile browsers & add CSS class as appropriate.
+    document.addEventListener( "impress:init", function( event ) {
+        var body = document.body;
+        if ( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+                 navigator.userAgent
+             ) ) {
+            body.classList.add( "impress-mobile" );
+        }
+
+        // Unset all this on teardown
+        var api = event.detail.api;
+        api.lib.gc.pushCallback( function() {
+            document.body.classList.remove( "impress-mobile" );
+            var prev = document.getElementsByClassName( "prev" )[ 0 ];
+            var next = document.getElementsByClassName( "next" )[ 0 ];
+            if ( typeof prev !== "undefined" ) {
+                prev.classList.remove( "prev" );
+            }
+            if ( typeof next !== "undefined" ) {
+                next.classList.remove( "next" );
+            }
+        } );
+    } );
+
+    // Add prev and next classes to the siblings of the newly entered active step element
+    // Remove prev and next classes from their current step elements
+    // Note: As an exception we break namespacing rules, as these are useful general purpose
+    // classes. (Naming rules would require us to use css classes mobile-next and mobile-prev,
+    // based on plugin name.)
+    document.addEventListener( "impress:stepenter", function( event ) {
+              var oldprev = document.getElementsByClassName( "prev" )[ 0 ];
+              var oldnext = document.getElementsByClassName( "next" )[ 0 ];
+
+              var prev = getPrevStep( event.target );
+              prev.classList.add( "prev" );
+              var next = getNextStep( event.target );
+              next.classList.add( "next" );
+
+              if ( typeof oldprev !== "undefined" ) {
+                      oldprev.classList.remove( "prev" );
+              }
+              if ( typeof oldnext !== "undefined" ) {
+                      oldnext.classList.remove( "next" );
+              }
+    } );
+} )( document );
+
+
+/**
+ * Mouse timeout plugin
+ *
+ * After 3 seconds of mouse inactivity, add the css class
+ * `body.impress-mouse-timeout`. On `mousemove`, `click` or `touch`, remove the
+ * class.
+ *
+ * The use case for this plugin is to use CSS to hide elements from the screen
+ * and only make them visible when the mouse is moved. Examples where this
+ * might be used are: the toolbar from the toolbar plugin, and the mouse cursor
+ * itself.
+ *
+ * Example CSS:
+ *
+ *     body.impress-mouse-timeout {
+ *         cursor: none;
+ *     }
+ *     body.impress-mouse-timeout div#impress-toolbar {
+ *         display: none;
+ *     }
+ *
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global window, document */
+( function( document, window ) {
+    "use strict";
+    var timeout = 3;
+    var timeoutHandle;
+
+    var hide = function() {
+
+        // Mouse is now inactive
+        document.body.classList.add( "impress-mouse-timeout" );
+    };
+
+    var show = function() {
+        if ( timeoutHandle ) {
+            window.clearTimeout( timeoutHandle );
+        }
+
+        // Mouse is now active
+        document.body.classList.remove( "impress-mouse-timeout" );
+
+        // Then set new timeout after which it is considered inactive again
+        timeoutHandle = window.setTimeout( hide, timeout * 1000 );
+    };
+
+    document.addEventListener( "impress:init", function( event ) {
+        var api = event.detail.api;
+        var gc = api.lib.gc;
+        gc.addEventListener( document, "mousemove", show );
+        gc.addEventListener( document, "click", show );
+        gc.addEventListener( document, "touch", show );
+
+        // Set first timeout
+        show();
+
+        // Unset all this on teardown
+        gc.pushCallback( function() {
+            window.clearTimeout( timeoutHandle );
+            document.body.classList.remove( "impress-mouse-timeout" );
+        } );
+    }, false );
+
+} )( document, window );
+
+/**
+ * Navigation events plugin
+ *
+ * As you can see this part is separate from the impress.js core code.
+ * It's because these navigation actions only need what impress.js provides with
+ * its simple API.
+ *
+ * This plugin is what we call an _init plugin_. It's a simple kind of
+ * impress.js plugin. When loaded, it starts listening to the `impress:init`
+ * event. That event listener initializes the plugin functionality - in this
+ * case we listen to some keypress and mouse events. The only dependencies on
+ * core impress.js functionality is the `impress:init` method, as well as using
+ * the public api `next(), prev(),` etc when keys are pressed.
+ *
+ * Copyright 2011-2012 Bartek Szopka (@bartaz)
+ * Released under the MIT license.
+ * ------------------------------------------------
+ *  author:  Bartek Szopka
+ *  version: 0.5.3
+ *  url:     http://bartaz.github.com/impress.js/
+ *  source:  http://github.com/bartaz/impress.js/
+ *
+ */
+/* global document */
+( function( document ) {
+    "use strict";
+
+    // Wait for impress.js to be initialized
+    document.addEventListener( "impress:init", function( event ) {
+
+        // Getting API from event data.
+        // So you don't event need to know what is the id of the root element
+        // or anything. `impress:init` event data gives you everything you
+        // need to control the presentation that was just initialized.
+        var api = event.detail.api;
+        var gc = api.lib.gc;
+        var util = api.lib.util;
+
+        // Supported keys are:
+        // [space] - quite common in presentation software to move forward
+        // [up] [right] / [down] [left] - again common and natural addition,
+        // [pgdown] / [pgup] - often triggered by remote controllers,
+        // [tab] - this one is quite controversial, but the reason it ended up on
+        //   this list is quite an interesting story... Remember that strange part
+        //   in the impress.js code where window is scrolled to 0,0 on every presentation
+        //   step, because sometimes browser scrolls viewport because of the focused element?
+        //   Well, the [tab] key by default navigates around focusable elements, so clicking
+        //   it very often caused scrolling to focused element and breaking impress.js
+        //   positioning. I didn't want to just prevent this default action, so I used [tab]
+        //   as another way to moving to next step... And yes, I know that for the sake of
+        //   consistency I should add [shift+tab] as opposite action...
+        var isNavigationEvent = function( event ) {
+
+            // Don't trigger navigation for example when user returns to browser window with ALT+TAB
+            if ( event.altKey || event.ctrlKey || event.metaKey ) {
+                return false;
+            }
+
+            // In the case of TAB, we force step navigation always, overriding the browser
+            // navigation between input elements, buttons and links.
+            if ( event.keyCode === 9 ) {
+                return true;
+            }
+
+            // With the sole exception of TAB, we also ignore keys pressed if shift is down.
+            if ( event.shiftKey ) {
+                return false;
+            }
+
+            if ( ( event.keyCode >= 32 && event.keyCode <= 34 ) ||
+                 ( event.keyCode >= 37 && event.keyCode <= 40 ) ) {
+                return true;
+            }
+        };
+
+        // KEYBOARD NAVIGATION HANDLERS
+
+        // Prevent default keydown action when one of supported key is pressed.
+        gc.addEventListener( document, "keydown", function( event ) {
+            if ( isNavigationEvent( event ) ) {
+                event.preventDefault();
+            }
+        }, false );
+
+        // Trigger impress action (next or prev) on keyup.
+        gc.addEventListener( document, "keyup", function( event ) {
+            if ( isNavigationEvent( event ) ) {
+                if ( event.shiftKey ) {
+                    switch ( event.keyCode ) {
+                        case 9: // Shift+tab
+                            api.prev();
+                            break;
+                    }
+                } else {
+                    switch ( event.keyCode ) {
+                        case 33: // Pg up
+                        case 37: // Left
+                        case 38: // Up
+                                 api.prev( event );
+                                 break;
+                        case 9:  // Tab
+                        case 32: // Space
+                        case 34: // Pg down
+                        case 39: // Right
+                        case 40: // Down
+                                 api.next( event );
+                                 break;
+                    }
+                }
+                event.preventDefault();
+            }
+        }, false );
+
+        // Delegated handler for clicking on the links to presentation steps
+        gc.addEventListener( document, "click", function( event ) {
+
+            // Event delegation with "bubbling"
+            // check if event target (or any of its parents is a link)
+            var target = event.target;
+            try {
+                while ( ( target.tagName !== "A" ) &&
+                        ( target !== document.documentElement ) ) {
+                    target = target.parentNode;
+                }
+
+                if ( target.tagName === "A" ) {
+                    var href = target.getAttribute( "href" );
+
+                    // If it's a link to presentation step, target this step
+                    if ( href && href[ 0 ] === "#" ) {
+                        target = document.getElementById( href.slice( 1 ) );
+                    }
+                }
+
+                if ( api.goto( target ) ) {
+                    event.stopImmediatePropagation();
+                    event.preventDefault();
+                }
+            }
+            catch ( err ) {
+
+                // For example, when clicking on the button to launch speaker console, the button
+                // is immediately deleted from the DOM. In this case target is a DOM element when
+                // we get it, but turns out to be null if you try to actually do anything with it.
+                if ( err instanceof TypeError &&
+                     err.message === "target is null" ) {
+                    return;
+                }
+                throw err;
+            }
+        }, false );
+
+        // Delegated handler for clicking on step elements
+        gc.addEventListener( document, "click", function( event ) {
+            var target = event.target;
+            try {
+
+                // Find closest step element that is not active
+                while ( !( target.classList.contains( "step" ) &&
+                        !target.classList.contains( "active" ) ) &&
+                        ( target !== document.documentElement ) ) {
+                    target = target.parentNode;
+                }
+
+                if ( api.goto( target ) ) {
+                    event.preventDefault();
+                }
+            }
+            catch ( err ) {
+
+                // For example, when clicking on the button to launch speaker console, the button
+                // is immediately deleted from the DOM. In this case target is a DOM element when
+                // we get it, but turns out to be null if you try to actually do anything with it.
+                if ( err instanceof TypeError &&
+                     err.message === "target is null" ) {
+                    return;
+                }
+                throw err;
+            }
+        }, false );
+
+        // Add a line to the help popup
+        util.triggerEvent( document, "impress:help:add", { command: "Left &amp; Right",
+                                                           text: "Previous &amp; Next step",
+                                                           row: 1 } );
+
+    }, false );
+
+} )( document );
+
+
+/**
+ * Navigation UI plugin
+ *
+ * This plugin provides UI elements "back", "forward" and a list to select
+ * a specific slide number.
+ *
+ * The navigation controls are added to the toolbar plugin via DOM events. User must enable the
+ * toolbar in a presentation to have them visible.
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+
+// This file contains so much HTML, that we will just respectfully disagree about js
+/* jshint quotmark:single */
+/* global document */
+
+( function( document ) {
+    'use strict';
+    var toolbar;
+    var api;
+    var root;
+    var steps;
+    var hideSteps = [];
+    var prev;
+    var select;
+    var next;
+
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( 'CustomEvent' );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    var makeDomElement = function( html ) {
+        var tempDiv = document.createElement( 'div' );
+        tempDiv.innerHTML = html;
+        return tempDiv.firstChild;
+    };
+
+    var selectOptionsHtml = function() {
+        var options = '';
+        for ( var i = 0; i < steps.length; i++ ) {
+
+            // Omit steps that are listed as hidden from select widget
+            if ( hideSteps.indexOf( steps[ i ] ) < 0 ) {
+                options = options + '<option value="' + steps[ i ].id + '">' + // jshint ignore:line
+                                    steps[ i ].id + '</option>' + '\n'; // jshint ignore:line
+            }
+        }
+        return options;
+    };
+
+    var addNavigationControls = function( event ) {
+        api = event.detail.api;
+        var gc = api.lib.gc;
+        root = event.target;
+        steps = root.querySelectorAll( '.step' );
+
+        var prevHtml   = '<button id="impress-navigation-ui-prev" title="Previous" ' +
+                         'class="impress-navigation-ui">&lt;</button>';
+        var selectHtml = '<select id="impress-navigation-ui-select" title="Go to" ' +
+                         'class="impress-navigation-ui">' + '\n' +
+                           selectOptionsHtml() +
+                           '</select>';
+        var nextHtml   = '<button id="impress-navigation-ui-next" title="Next" ' +
+                         'class="impress-navigation-ui">&gt;</button>';
+
+        prev = makeDomElement( prevHtml );
+        prev.addEventListener( 'click',
+            function() {
+                api.prev();
+        } );
+        select = makeDomElement( selectHtml );
+        select.addEventListener( 'change',
+            function( event ) {
+                api.goto( event.target.value );
+        } );
+        gc.addEventListener( root, 'impress:steprefresh', function( event ) {
+
+            // As impress.js core now allows to dynamically edit the steps, including adding,
+            // removing, and reordering steps, we need to requery and redraw the select list on
+            // every stepenter event.
+            steps = root.querySelectorAll( '.step' );
+            select.innerHTML = '\n' + selectOptionsHtml();
+
+            // Make sure the list always shows the step we're actually on, even if it wasn't
+            // selected from the list
+            select.value = event.target.id;
+        } );
+        next = makeDomElement( nextHtml );
+        next.addEventListener( 'click',
+            function() {
+                api.next();
+        } );
+
+        triggerEvent( toolbar, 'impress:toolbar:appendChild', { group: 0, element: prev } );
+        triggerEvent( toolbar, 'impress:toolbar:appendChild', { group: 0, element: select } );
+        triggerEvent( toolbar, 'impress:toolbar:appendChild', { group: 0, element: next } );
+
+    };
+
+    // API for not listing given step in the select widget.
+    // For example, if you set class="skip" on some element, you may not want it to show up in the
+    // list either. Otoh we cannot assume that, or anything else, so steps that user wants omitted
+    // must be specifically added with this API call.
+    document.addEventListener( 'impress:navigation-ui:hideStep', function( event ) {
+        hideSteps.push( event.target );
+        if ( select ) {
+            select.innerHTML = selectOptionsHtml();
+        }
+    }, false );
+
+    // Wait for impress.js to be initialized
+    document.addEventListener( 'impress:init', function( event ) {
+        toolbar = document.querySelector( '#impress-toolbar' );
+        if ( toolbar ) {
+            addNavigationControls( event );
+        }
+    }, false );
+
+} )( document );
+
+
+/* global document */
+( function( document ) {
+    "use strict";
+    var root;
+    var stepids = [];
+
+    // Get stepids from the steps under impress root
+    var getSteps = function() {
+        stepids = [];
+        var steps = root.querySelectorAll( ".step" );
+        for ( var i = 0; i < steps.length; i++ )
+        {
+          stepids[ i + 1 ] = steps[ i ].id;
+        }
+        };
+
+    // Wait for impress.js to be initialized
+    document.addEventListener( "impress:init", function( event ) {
+            root = event.target;
+        getSteps();
+        var gc = event.detail.api.lib.gc;
+        gc.pushCallback( function() {
+            stepids = [];
+            if ( progressbar ) {
+                progressbar.style.width = "";
+                        }
+            if ( progress ) {
+                progress.innerHTML = "";
+                        }
+        } );
+    } );
+
+    var progressbar = document.querySelector( "div.impress-progressbar div" );
+    var progress = document.querySelector( "div.impress-progress" );
+
+    if ( null !== progressbar || null !== progress ) {
+        document.addEventListener( "impress:stepleave", function( event ) {
+            updateProgressbar( event.detail.next.id );
+        } );
+
+        document.addEventListener( "impress:steprefresh", function( event ) {
+            getSteps();
+            updateProgressbar( event.target.id );
+        } );
+
+    }
+
+    function updateProgressbar( slideId ) {
+        var slideNumber = stepids.indexOf( slideId );
+        if ( null !== progressbar ) {
+                        var width = 100 / ( stepids.length - 1 ) * ( slideNumber );
+            progressbar.style.width = width.toFixed( 2 ) + "%";
+        }
+        if ( null !== progress ) {
+            progress.innerHTML = slideNumber + "/" + ( stepids.length - 1 );
+        }
+    }
+} )( document );
+
+/**
+ * Relative Positioning Plugin
+ *
+ * This plugin provides support for defining the coordinates of a step relative
+ * to the previous step. This is often more convenient when creating presentations,
+ * since as you add, remove or move steps, you may not need to edit the positions
+ * as much as is the case with the absolute coordinates supported by impress.js
+ * core.
+ *
+ * Example:
+ *
+ *         <!-- Position step 1000 px to the right and 500 px up from the previous step. -->
+ *         <div class="step" data-rel-x="1000" data-rel-y="500">
+ *
+ * Following html attributes are supported for step elements:
+ *
+ *     data-rel-x
+ *     data-rel-y
+ *     data-rel-z
+ *
+ * These values are also inherited from the previous step. This makes it easy to
+ * create a boring presentation where each slide shifts for example 1000px down
+ * from the previous.
+ *
+ * In addition to plain numbers, which are pixel values, it is also possible to
+ * define relative positions as a multiple of screen height and width, using
+ * a unit of "h" and "w", respectively, appended to the number.
+ *
+ * Example:
+ *
+ *        <div class="step" data-rel-x="1.5w" data-rel-y="1.5h">
+ *
+ * This plugin is a *pre-init plugin*. It is called synchronously from impress.js
+ * core at the beginning of `impress().init()`. This allows it to process its own
+ * data attributes first, and possibly alter the data-x, data-y and data-z attributes
+ * that will then be processed by `impress().init()`.
+ *
+ * (Another name for this kind of plugin might be called a *filter plugin*, but
+ * *pre-init plugin* is more generic, as a plugin might do whatever it wants in
+ * the pre-init stage.)
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+
+/* global document, window */
+
+( function( document, window ) {
+    "use strict";
+
+    var startingState = {};
+
+    /**
+     * Copied from core impress.js. We currently lack a library mechanism to
+     * to share utility functions like this.
+     */
+    var toNumber = function( numeric, fallback ) {
+        return isNaN( numeric ) ? ( fallback || 0 ) : Number( numeric );
+    };
+
+    /**
+     * Extends toNumber() to correctly compute also relative-to-screen-size values 5w and 5h.
+     *
+     * Returns the computed value in pixels with w/h postfix removed.
+     */
+    var toNumberAdvanced = function( numeric, fallback ) {
+        if ( typeof numeric !== "string" ) {
+            return toNumber( numeric, fallback );
+        }
+        var ratio = numeric.match( /^([+-]*[\d\.]+)([wh])$/ );
+        if ( ratio == null ) {
+            return toNumber( numeric, fallback );
+        } else {
+            var value = parseFloat( ratio[ 1 ] );
+            var multiplier = ratio[ 2 ] === "w" ? window.innerWidth : window.innerHeight;
+            return value * multiplier;
+        }
+    };
+
+    var computeRelativePositions = function( el, prev ) {
+        var data = el.dataset;
+
+        if ( !prev ) {
+
+            // For the first step, inherit these defaults
+            prev = { x:0, y:0, z:0, relative: { x:0, y:0, z:0 } };
+        }
+
+        var step = {
+                x: toNumber( data.x, prev.x ),
+                y: toNumber( data.y, prev.y ),
+                z: toNumber( data.z, prev.z ),
+                relative: {
+                    x: toNumberAdvanced( data.relX, prev.relative.x ),
+                    y: toNumberAdvanced( data.relY, prev.relative.y ),
+                    z: toNumberAdvanced( data.relZ, prev.relative.z )
+                }
+            };
+
+        // Relative position is ignored/zero if absolute is given.
+        // Note that this also has the effect of resetting any inherited relative values.
+        if ( data.x !== undefined ) {
+            step.relative.x = 0;
+        }
+        if ( data.y !== undefined ) {
+            step.relative.y = 0;
+        }
+        if ( data.z !== undefined ) {
+            step.relative.z = 0;
+        }
+
+        // Apply relative position to absolute position, if non-zero
+        // Note that at this point, the relative values contain a number value of pixels.
+        step.x = step.x + step.relative.x;
+        step.y = step.y + step.relative.y;
+        step.z = step.z + step.relative.z;
+
+        return step;
+    };
+
+    var rel = function( root ) {
+        var steps = root.querySelectorAll( ".step" );
+        var prev;
+        startingState[ root.id ] = [];
+        for ( var i = 0; i < steps.length; i++ ) {
+            var el = steps[ i ];
+            startingState[ root.id ].push( {
+                el: el,
+                x: el.getAttribute( "data-x" ),
+                y: el.getAttribute( "data-y" ),
+                z: el.getAttribute( "data-z" )
+            } );
+            var step = computeRelativePositions( el, prev );
+
+            // Apply relative position (if non-zero)
+            el.setAttribute( "data-x", step.x );
+            el.setAttribute( "data-y", step.y );
+            el.setAttribute( "data-z", step.z );
+            prev = step;
+        }
+    };
+
+    // Register the plugin to be called in pre-init phase
+    window.impress.addPreInitPlugin( rel );
+
+    // Register teardown callback to reset the data.x, .y, .z values.
+    document.addEventListener( "impress:init", function( event ) {
+        var root = event.target;
+        event.detail.api.lib.gc.pushCallback( function() {
+            var steps = startingState[ root.id ];
+            var step;
+            while ( step = steps.pop() ) {
+                if ( step.x === null ) {
+                    step.el.removeAttribute( "data-x" );
+                } else {
+                    step.el.setAttribute( "data-x", step.x );
+                }
+                if ( step.y === null ) {
+                    step.el.removeAttribute( "data-y" );
+                } else {
+                    step.el.setAttribute( "data-y", step.y );
+                }
+                if ( step.z === null ) {
+                    step.el.removeAttribute( "data-z" );
+                } else {
+                    step.el.setAttribute( "data-z", step.z );
+                }
+            }
+            delete startingState[ root.id ];
+        } );
+    }, false );
+} )( document, window );
+
+
+/**
+ * Resize plugin
+ *
+ * Rescale the presentation after a window resize.
+ *
+ * Copyright 2011-2012 Bartek Szopka (@bartaz)
+ * Released under the MIT license.
+ * ------------------------------------------------
+ *  author:  Bartek Szopka
+ *  version: 0.5.3
+ *  url:     http://bartaz.github.com/impress.js/
+ *  source:  http://github.com/bartaz/impress.js/
+ *
+ */
+
+/* global document, window */
+
+( function( document, window ) {
+    "use strict";
+
+    // Wait for impress.js to be initialized
+    document.addEventListener( "impress:init", function( event ) {
+        var api = event.detail.api;
+
+        // Rescale presentation when window is resized
+        api.lib.gc.addEventListener( window, "resize", api.lib.util.throttle( function() {
+
+            // Force going to active step again, to trigger rescaling
+            api.goto( document.querySelector( ".step.active" ), 500 );
+        }, 250 ), false );
+    }, false );
+
+} )( document, window );
+
+
+/**
+ * Skip Plugin
+ *
+ * Example:
+ *
+ *    <!-- This slide is disabled in presentations, when moving with next()
+ *         and prev() commands, but you can still move directly to it, for
+ *         example with a url (anything using goto()). -->
+ *         <div class="step skip">
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+
+/* global document, window */
+
+( function( document, window ) {
+    "use strict";
+    var util;
+
+    document.addEventListener( "impress:init", function( event ) {
+        util = event.detail.api.lib.util;
+    }, false );
+
+    var getNextStep = function( el ) {
+        var steps = document.querySelectorAll( ".step" );
+        for ( var i = 0; i < steps.length; i++ ) {
+            if ( steps[ i ] === el ) {
+                if ( i + 1 < steps.length ) {
+                    return steps[ i + 1 ];
+                } else {
+                    return steps[ 0 ];
+                }
+            }
+        }
+    };
+    var getPrevStep = function( el ) {
+        var steps = document.querySelectorAll( ".step" );
+        for ( var i = steps.length - 1; i >= 0; i-- ) {
+            if ( steps[ i ] === el ) {
+                if ( i - 1 >= 0 ) {
+                    return steps[ i - 1 ];
+                } else {
+                    return steps[ steps.length - 1 ];
+                }
+            }
+        }
+    };
+
+    var skip = function( event ) {
+        if ( ( !event ) || ( !event.target ) ) {
+            return;
+        }
+
+        if ( event.detail.next.classList.contains( "skip" ) ) {
+            if ( event.detail.reason === "next" ) {
+
+                // Go to the next next step instead
+                event.detail.next = getNextStep( event.detail.next );
+
+                // Recursively call this plugin again, until there's a step not to skip
+                skip( event );
+            } else if ( event.detail.reason === "prev" ) {
+
+                // Go to the previous previous step instead
+                event.detail.next = getPrevStep( event.detail.next );
+                skip( event );
+            }
+
+            // If the new next element has its own transitionDuration, we're responsible for setting
+            // that on the event as well
+            event.detail.transitionDuration = util.toNumber(
+                event.detail.next.dataset.transitionDuration, event.detail.transitionDuration
+            );
+        }
+    };
+
+    // Register the plugin to be called in pre-stepleave phase
+    // The weight makes this plugin run early. This is a good thing, because this plugin calls
+    // itself recursively.
+    window.impress.addPreStepLeavePlugin( skip, 1 );
+
+} )( document, window );
+
+
+/**
+ * Stop Plugin
+ *
+ * Example:
+ *
+ *        <!-- Stop at this slide.
+ *             (For example, when used on the last slide, this prevents the
+ *             presentation from wrapping back to the beginning.) -->
+ *        <div class="step stop">
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global document, window */
+( function( document, window ) {
+    "use strict";
+
+    var stop = function( event ) {
+        if ( ( !event ) || ( !event.target ) ) {
+            return;
+        }
+
+        if ( event.target.classList.contains( "stop" ) ) {
+            if ( event.detail.reason === "next" ) {
+                return false;
+            }
+        }
+    };
+
+    // Register the plugin to be called in pre-stepleave phase
+    // The weight makes this plugin run fairly early.
+    window.impress.addPreStepLeavePlugin( stop, 2 );
+
+} )( document, window );
+
+
+/**
+ * Substep Plugin
+ *
+ * Copyright 2017 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+
+/* global document, window */
+
+( function( document, window ) {
+    "use strict";
+
+    // Copied from core impress.js. Good candidate for moving to src/lib/util.js.
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( "CustomEvent" );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    var activeStep = null;
+    document.addEventListener( "impress:stepenter", function( event ) {
+        activeStep = event.target;
+    }, false );
+
+    var substep = function( event ) {
+        if ( ( !event ) || ( !event.target ) ) {
+            return;
+        }
+
+        var step = event.target;
+        var el; // Needed by jshint
+        if ( event.detail.reason === "next" ) {
+            el = showSubstepIfAny( step );
+            if ( el ) {
+
+                // Send a message to others, that we aborted a stepleave event.
+                // Autoplay will reload itself from this, as there won't be a stepenter event now.
+                triggerEvent( step, "impress:substep:stepleaveaborted",
+                              { reason: "next", substep: el } );
+
+                // Returning false aborts the stepleave event
+                return false;
+            }
+        }
+        if ( event.detail.reason === "prev" ) {
+            el = hideSubstepIfAny( step );
+            if ( el ) {
+                triggerEvent( step, "impress:substep:stepleaveaborted",
+                              { reason: "prev", substep: el } );
+                return false;
+            }
+        }
+    };
+
+    var showSubstepIfAny = function( step ) {
+        var substeps = step.querySelectorAll( ".substep" );
+        var visible = step.querySelectorAll( ".substep-visible" );
+        if ( substeps.length > 0 ) {
+            return showSubstep( substeps, visible );
+        }
+    };
+
+    var showSubstep = function( substeps, visible ) {
+        if ( visible.length < substeps.length ) {
+            var el = substeps[ visible.length ];
+            el.classList.add( "substep-visible" );
+            return el;
+        }
+    };
+
+    var hideSubstepIfAny = function( step ) {
+        var substeps = step.querySelectorAll( ".substep" );
+        var visible = step.querySelectorAll( ".substep-visible" );
+        if ( substeps.length > 0 ) {
+            return hideSubstep( visible );
+        }
+    };
+
+    var hideSubstep = function( visible ) {
+        if ( visible.length > 0 ) {
+            var el = visible[ visible.length - 1 ];
+            el.classList.remove( "substep-visible" );
+            return el;
+        }
+    };
+
+    // Register the plugin to be called in pre-stepleave phase.
+    // The weight makes this plugin run before other preStepLeave plugins.
+    window.impress.addPreStepLeavePlugin( substep, 1 );
+
+    // When entering a step, in particular when re-entering, make sure that all substeps are hidden
+    // at first
+    document.addEventListener( "impress:stepenter", function( event ) {
+        var step = event.target;
+        var visible = step.querySelectorAll( ".substep-visible" );
+        for ( var i = 0; i < visible.length; i++ ) {
+            visible[ i ].classList.remove( "substep-visible" );
+        }
+    }, false );
+
+    // API for others to reveal/hide next substep ////////////////////////////////////////////////
+    document.addEventListener( "impress:substep:show", function() {
+        showSubstepIfAny( activeStep );
+    }, false );
+
+    document.addEventListener( "impress:substep:hide", function() {
+        hideSubstepIfAny( activeStep );
+    }, false );
+
+} )( document, window );
+
+
+/**
+ * Support for swipe and tap on touch devices
+ *
+ * This plugin implements navigation for plugin devices, via swiping left/right,
+ * or tapping on the left/right edges of the screen.
+ *
+ *
+ *
+ * Copyright 2015: Andrew Dunai (@and3rson)
+ * Modified to a plugin, 2016: Henrik Ingo (@henrikingo)
+ *
+ * MIT License
+ */
+/* global document, window */
+( function( document, window ) {
+    "use strict";
+
+    // Touch handler to detect swiping left and right based on window size.
+    // If the difference in X change is bigger than 1/20 of the screen width,
+    // we simply call an appropriate API function to complete the transition.
+    var startX = 0;
+    var lastX = 0;
+    var lastDX = 0;
+    var threshold = window.innerWidth / 20;
+
+    document.addEventListener( "touchstart", function( event ) {
+        lastX = startX = event.touches[ 0 ].clientX;
+    } );
+
+    document.addEventListener( "touchmove", function( event ) {
+         var x = event.touches[ 0 ].clientX;
+         var diff = x - startX;
+
+         // To be used in touchend
+         lastDX = lastX - x;
+         lastX = x;
+
+         window.impress().swipe( diff / window.innerWidth );
+     } );
+
+     document.addEventListener( "touchend", function() {
+         var totalDiff = lastX - startX;
+         if ( Math.abs( totalDiff ) > window.innerWidth / 5 && ( totalDiff * lastDX ) <= 0 ) {
+             if ( totalDiff > window.innerWidth / 5 && lastDX <= 0 ) {
+                 window.impress().prev();
+             } else if ( totalDiff < -window.innerWidth / 5 && lastDX >= 0 ) {
+                 window.impress().next();
+             }
+         } else if ( Math.abs( lastDX ) > threshold ) {
+             if ( lastDX < -threshold ) {
+                 window.impress().prev();
+             } else if ( lastDX > threshold ) {
+                 window.impress().next();
+             }
+         } else {
+
+             // No movement - move (back) to the current slide
+             window.impress().goto( document.querySelector( "#impress .step.active" ) );
+         }
+     } );
+
+     document.addEventListener( "touchcancel", function() {
+
+             // Move (back) to the current slide
+             window.impress().goto( document.querySelector( "#impress .step.active" ) );
+     } );
+
+} )( document, window );
+
+/**
+ * Toolbar plugin
+ *
+ * This plugin provides a generic graphical toolbar. Other plugins that
+ * want to expose a button or other widget, can add those to this toolbar.
+ *
+ * Using a single consolidated toolbar for all GUI widgets makes it easier
+ * to position and style the toolbar rather than having to do that for lots
+ * of different divs.
+ *
+ *
+ * *** For presentation authors: *****************************************
+ *
+ * To add/activate the toolbar in your presentation, add this div:
+ *
+ *     <div id="impress-toolbar"></div>
+ *
+ * Styling the toolbar is left to presentation author. Here's an example CSS:
+ *
+ *    .impress-enabled div#impress-toolbar {
+ *        position: fixed;
+ *        right: 1px;
+ *        bottom: 1px;
+ *        opacity: 0.6;
+ *    }
+ *    .impress-enabled div#impress-toolbar > span {
+ *        margin-right: 10px;
+ *    }
+ *
+ * The [mouse-timeout](../mouse-timeout/README.md) plugin can be leveraged to hide
+ * the toolbar from sight, and only make it visible when mouse is moved.
+ *
+ *    body.impress-mouse-timeout div#impress-toolbar {
+ *        display: none;
+ *    }
+ *
+ *
+ * *** For plugin authors **********************************************
+ *
+ * To add a button to the toolbar, trigger the `impress:toolbar:appendChild`
+ * or `impress:toolbar:insertBefore` events as appropriate. The detail object
+ * should contain following parameters:
+ *
+ *    { group : 1,                       // integer. Widgets with the same group are grouped inside
+ *                                       // the same <span> element.
+ *      html : "<button>Click</button>", // The html to add.
+ *      callback : "mycallback",         // Toolbar plugin will trigger event
+ *                                       // `impress:toolbar:added:mycallback` when done.
+ *      before: element }                // The reference element for an insertBefore() call.
+ *
+ * You should also listen to the `impress:toolbar:added:mycallback` event. At
+ * this point you can find the new widget in the DOM, and for example add an
+ * event listener to it.
+ *
+ * You are free to use any integer for the group. It's ok to leave gaps. It's
+ * ok to co-locate with widgets for another plugin, if you think they belong
+ * together.
+ *
+ * See navigation-ui for an example.
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+
+/* global document */
+
+( function( document ) {
+    "use strict";
+    var toolbar = document.getElementById( "impress-toolbar" );
+    var groups = [];
+
+    /**
+     * Get the span element that is a child of toolbar, identified by index.
+     *
+     * If span element doesn't exist yet, it is created.
+     *
+     * Note: Because of Run-to-completion, this is not a race condition.
+     * https://developer.mozilla.org/en/docs/Web/JavaScript/EventLoop#Run-to-completion
+     *
+     * :param: index   Method will return the element <span id="impress-toolbar-group-{index}">
+     */
+    var getGroupElement = function( index ) {
+        var id = "impress-toolbar-group-" + index;
+        if ( !groups[ index ] ) {
+            groups[ index ] = document.createElement( "span" );
+            groups[ index ].id = id;
+            var nextIndex = getNextGroupIndex( index );
+            if ( nextIndex === undefined ) {
+                toolbar.appendChild( groups[ index ] );
+            } else {
+                toolbar.insertBefore( groups[ index ], groups[ nextIndex ] );
+            }
+        }
+        return groups[ index ];
+    };
+
+    /**
+     * Get the span element from groups[] that is immediately after given index.
+     *
+     * This can be used to find the reference node for an insertBefore() call.
+     * If no element exists at a larger index, returns undefined. (In this case,
+     * you'd use appendChild() instead.)
+     *
+     * Note that index needn't itself exist in groups[].
+     */
+    var getNextGroupIndex = function( index ) {
+        var i = index + 1;
+        while ( !groups[ i ] && i < groups.length ) {
+            i++;
+        }
+        if ( i < groups.length ) {
+            return i;
+        }
+    };
+
+    // API
+    // Other plugins can add and remove buttons by sending them as events.
+    // In return, toolbar plugin will trigger events when button was added.
+    if ( toolbar ) {
+        /**
+         * Append a widget inside toolbar span element identified by given group index.
+         *
+         * :param: e.detail.group    integer specifying the span element where widget will be placed
+         * :param: e.detail.element  a dom element to add to the toolbar
+         */
+        toolbar.addEventListener( "impress:toolbar:appendChild", function( e ) {
+            var group = getGroupElement( e.detail.group );
+            group.appendChild( e.detail.element );
+        } );
+
+        /**
+         * Add a widget to toolbar using insertBefore() DOM method.
+         *
+         * :param: e.detail.before   the reference dom element, before which new element is added
+         * :param: e.detail.element  a dom element to add to the toolbar
+         */
+        toolbar.addEventListener( "impress:toolbar:insertBefore", function( e ) {
+            toolbar.insertBefore( e.detail.element, e.detail.before );
+        } );
+
+        /**
+         * Remove the widget in e.detail.remove.
+         */
+        toolbar.addEventListener( "impress:toolbar:removeWidget", function( e ) {
+            toolbar.removeChild( e.detail.remove );
+        } );
+
+        document.addEventListener( "impress:init", function( event ) {
+            var api = event.detail.api;
+            api.lib.gc.pushCallback( function() {
+                toolbar.innerHTML = "";
+                groups = [];
+            } );
+        } );
+    } // If toolbar
+
+} )( document );
diff --git a/html_output/slides.css b/html_output/slides.css
new file mode 100644
index 0000000..f5fad89
--- /dev/null
+++ b/html_output/slides.css
@@ -0,0 +1,101 @@
+
+@font-face {
+  font-family: 'avara';
+  src: url("assets/fonts/Avara-Black.otf");
+  font-weight: bold;
+}
+
+@font-face {
+  font-family: 'nunito';
+  src: url("assets/fonts/nunito/Nunito-Light.ttf");
+}
+
+@font-face {
+  font-family: 'nunito';
+  src: url("assets/fonts/nunito/Nunito-Bold.ttf");
+  font-weight: bold;
+}
+
+
+html {
+  font-size: 62.5%;
+}
+
+body {
+  font-size: 2.5rem;
+  font-family: "nunito";
+}
+
+a {
+  color: teal;
+}
+
+img {
+  max-width: 100%;
+}
+
+.step strong {
+  color: teal;
+  font-weight: normal;
+}
+
+.header p,
+h1, h2, h3, h4 {
+  font-family: 'avara';
+}
+
+.hidden {
+  width: 1px;
+  height: 1px;
+  opacity: 0;
+  overflow: hidden;
+}
+
+.header p {
+  font-size: 2rem;
+}
+
+.full-width-image img {
+  width: 100%;
+}
+
+.columns {
+  columns: 2;
+}
+
+.columns h1{
+  column-span: all;
+}
+
+.columns-2 {
+  columns: 2;
+}
+
+.columns-3 {
+  columns: 3;
+}
+
+.no-list ul {
+  margin: 0;
+  list-style: none;
+  padding: 0;;
+}
+
+.large-text {
+  font-size: 4rem;
+}
+
+div#the-slide-id img{
+  width: 100%;
+  height: 100%;
+}
+
+/* for drawing machines */
+
+.code-slide h1 {
+  transform: rotate(-90deg) translate(-100%,-150%);
+  transform-origin: top left;
+  position: absolute;
+  top: 0;
+  left: 0;
+}
\ No newline at end of file
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..3e0eb88
--- /dev/null
+++ b/makefile
@@ -0,0 +1,37 @@
+
+RST := slides.rst
+
+AUTHOR := `whoami`
+HTML := $(AUTHOR)-`date  '+%Y-%m-%d'`.html
+
+TODAY := `date  '+%Y-%m-%d'`
+
+OUTDIR := html_output
+
+
+all: help
+
+help:
+	@echo ""
+	@echo "--Help Menu"
+	@echo ""
+	@echo "1. make html"
+	@echo "2. make dist"
+	@echo "3. make clean"
+
+html:	$(OUTDIR)
+	hovercraft $(RST) $(OUTDIR)
+	@cp $(OUTDIR)/index.html $(OUTDIR)/$(TODAY)_$(AUTHOR).html
+#google-chrome-stable outdir/index.html&
+
+dist: $(OUTDIR)
+	@mkdir dist
+	@cp $(OUTDIR)/index.html dist/$(TODAY)_$(AUTHOR).html
+	@mv $(OUTDIR) $(TODAY)_$(AUTHOR) 
+	@zip -r dist/$(TODAY)_$(AUTHOR).zip $(TODAY)_$(AUTHOR) 
+	@rm -r $(TODAY)_$(AUTHOR)
+
+clean:
+	rm -rf $(OUTDIR)
+	rm -rf dist
+
diff --git a/modd.conf b/modd.conf
new file mode 100644
index 0000000..4e23fc5
--- /dev/null
+++ b/modd.conf
@@ -0,0 +1,4 @@
+**/*.rst {
+    prep: make html
+    daemon: devd -m ./html_output
+}
\ No newline at end of file
diff --git a/slides.css b/slides.css
new file mode 100644
index 0000000..f5fad89
--- /dev/null
+++ b/slides.css
@@ -0,0 +1,101 @@
+
+@font-face {
+  font-family: 'avara';
+  src: url("assets/fonts/Avara-Black.otf");
+  font-weight: bold;
+}
+
+@font-face {
+  font-family: 'nunito';
+  src: url("assets/fonts/nunito/Nunito-Light.ttf");
+}
+
+@font-face {
+  font-family: 'nunito';
+  src: url("assets/fonts/nunito/Nunito-Bold.ttf");
+  font-weight: bold;
+}
+
+
+html {
+  font-size: 62.5%;
+}
+
+body {
+  font-size: 2.5rem;
+  font-family: "nunito";
+}
+
+a {
+  color: teal;
+}
+
+img {
+  max-width: 100%;
+}
+
+.step strong {
+  color: teal;
+  font-weight: normal;
+}
+
+.header p,
+h1, h2, h3, h4 {
+  font-family: 'avara';
+}
+
+.hidden {
+  width: 1px;
+  height: 1px;
+  opacity: 0;
+  overflow: hidden;
+}
+
+.header p {
+  font-size: 2rem;
+}
+
+.full-width-image img {
+  width: 100%;
+}
+
+.columns {
+  columns: 2;
+}
+
+.columns h1{
+  column-span: all;
+}
+
+.columns-2 {
+  columns: 2;
+}
+
+.columns-3 {
+  columns: 3;
+}
+
+.no-list ul {
+  margin: 0;
+  list-style: none;
+  padding: 0;;
+}
+
+.large-text {
+  font-size: 4rem;
+}
+
+div#the-slide-id img{
+  width: 100%;
+  height: 100%;
+}
+
+/* for drawing machines */
+
+.code-slide h1 {
+  transform: rotate(-90deg) translate(-100%,-150%);
+  transform-origin: top left;
+  position: absolute;
+  top: 0;
+  left: 0;
+}
\ No newline at end of file
diff --git a/slides.rst b/slides.rst
new file mode 100644
index 0000000..6bd01cb
--- /dev/null
+++ b/slides.rst
@@ -0,0 +1,113 @@
+:title: Soilpunk Joulethief
+:author: Heerko van der Kooij
+:description: 
+:css: slides.css
+
+.. header::
+
+  Soilpunk 🌏🤘 - Joulethief
+
+----
+
+Soilpunk - Joulethief
+======================
+
+This document is viewable as `a webpage <https://github.com/hackersanddesigners/Soilpunk_technical_setup/blob/master/slides.rst>`_ or as `a slideshow <https://hackersanddesigners.github.io/Soilpunk_technical_setup/html_output/index.html>`_
+
+----
+
+:id: joulethief
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_simple.jpeg
+
+----
+
+Transistor
+==========
+
+.. image:: ./assets/images/transistor.png
+	:width: 300
+.. image:: ./assets/images/analogi-transistor-87050130.gif
+	:width: 500
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief.jpeg
+
+----
+
+:id: joulethief-step1
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_1.png
+ 
+A small current flows from the battery through the coil and the base-emitter path of the transistor. This opens the emittor-collector path of the transistor.
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_2.png
+	
+Electricity is now able to travel through the second coil and through the collector-emitter channel of the transistor.
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_3.png
+	
+The increasing amount of electricity through the second coil generates a negative voltage in the first coil.
+An negative voltage is induced in the first coil, which cause the transistor to close. 
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_4.png
+
+With the transistor closed the energy starts to flow through the output (led).
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_5.png
+
+The inductor is now powered by the magnetic field of the coil. 
+
+----
+
+Joulethief
+========================
+
+.. image:: ./assets/images/joulethief_6.png
+
+When the magnetic field is gone, the whole process `starts over <#joulethief-step1>`_.
+
+----
+
+Joulethief
+========================
+A more detailed explanation can be found on `instructables <https://www.instructables.com/Joule-Thief-Circuit-How-to-Make-and-Circuit-Explan/>`_
+
+----
+
+.. image:: ./assets/images/circuit.png
+
+
+----
+
+https://github.com/hackersanddesigners/Soilpunk_joulethief