Guide for running desktop demos?

[yiyinglai]

Description of issue (what needs changing)

No response

Clear description

No clear guide for running desktop demos. Beginners have to look into code and take some guesswork in order to run demos (not including hellow_world)

Correct links

No response

Parameters defined

No response

Returns defined

No response

Raises listed and defined

No response

Usage example

No response

Request visuals, if applicable

No response

Submit a pull request?

No response