Circuit blueprints

Circuit blueprints (or known as circuit diagrams) are used very commonly in electronic design. An example for a symbol in circuit blueprints:
Another circuit, but more clearly, it also has another mechanism called an Arduino interpreter, which is coding with circuits:
The output of the circuit above (when turned on):

Here's how you can make bold and italic text.

Here's how you can add an image:

Here's how to make a list:

• First thing
• Second thing
• Third thing

To learn more HTML/CSS, check out these tutorials!