1# Header 1
  2## Header 2
  3### Header 3
  4### Header {#custom-id}
  5
  6
  7
  8
  9
 10Link to [Header](#custom-id).  
 11Other file link [Header](https://www.asdf.org/file#id)
 12
 13> citation
 14>> citation 
 15>>> citation
 16
 17
 18
 19
 20> Without data you're just  
 21> another person with an opinion  
 22>  
 23>  Line breaks need two blanks at the end
 24
 25<br />
 26<br />
 27<br />
 28
 29
 30give me a white char&nbsp;1  
 31give me two white chars&ensp;2   
 32give me four white char&emsp;4
 33
 341. item 1
 352. item 2
 363. item 3
 37
 38- item 1
 39  - sub item 2
 40    - sub item 3
 41      - sub item 4
 42
 43
 44
 45
 46* item 1
 47  * sub item 2
 48
 49+ item 1
 50  + sub item 2
 51
 52
 53- [ ] unchecked
 54- [x] checked
 55
 56
 57---
 58
 59
 60
 61
 62:smiley:  
 63:smile:
 64
 65⚠️WARNING⚠️
 66❗IMPORTANT❗
 67🔥NEW🔥  
 68
 69✅ true
 70❌ false
 71
 72
 73🔴 red: +5V  
 74🟠 orange: +3.3V  
 75⚫ black: ground  
 76⚪ white: ground (pull-down)  
 77🟣 purple: I2C signal  
 78🟢 green: clock signal  
 79🟡 yellow: SPI signal  
 80🔵 blue: analogue input  
 81Input by pressing 'Win' + '.' and select emoji.
 82
 83
 84| style   |	markdown |
 85|---------|----------|
 86italic	  | *italic1* _italic2_
 87bold	    | **bold1** __bold2__
 88stroke	  | ~~stroke~~
 89highlight	| ==highlight1== <mark>highlight2</mark>
 90underline	| <u>underline++</u>
 91
 92
 93
 94
 95<mark style="color:#45B39D"> Marked text 1</mark>  
 96<mark style="background-color:#45B39D">
 97Marked text 2 </mark>  
 98<font color=#0fb503> color </font>
 99
100<style>
101r { color: Red }
102o { color: Orange }
103g { color: Green }
104</style>
105
106- <r>TODO:</r> Important thing to do
107- <o>TODO:</o> Less important thing to do
108- <g>DONE:</g> Breath deeply and improve karma
109
110
111
112---
113
114
115| Syntax | Description |
116| :--- | :----: |
117| Header | Title |
118| Paragraph | Text |
119
120---
121
122
123The abbreviations (e.g. HTML, JS ...) can be used
124everywhere and they will be extended by a hover text.
125
126
127*[HTML]: HyperText Markup Language
128*[JS]: Java Script
129
130Footnote[^1] or longer footnote[^test].
131
132[^1]: This is the first footnote.
133
134[^test]: Longer footnote text can be inserted using
135  indented text.
136
137
138---
139H~2~0  
140H<sub>2</sub>O  
141X^2^  
142X<sup>2</sup>
143
144$$
145\sin^2(a)+\cos^2(a) = 1
146$$
147
148
149---
150
151Automatic URL linking: http://www.asdf.com  
152Prevent automatic URL linking: `http://www.asdf.com`  
153URL using own text: [link](www.asdf.com)
154
155
156![image](picture.png)
157
158
159---
160
161
162Inline ``code`` uses \`\` code \`\`.
163
164 Codeblocks uses \`\`\` code block \`\`\`:
165```
166|-- \folder
167    |-- file.txt
168    |-- \sub folder
169        |-- file.txt
170
171```
172
173```python
174def hello_world():
175    print("Hello world!")
176```
177
178<!-- comments -->

def hello_world():
    print("Hello world!")