Noticed an easter egg in this article. The text below "I'm sorry, but in the year 2025, this is ridiculous:" is animated entirely without Javascript or .gif files. It's pure CSS.
This is how it was done: https://github.com/tavianator/tavianator.com/blob/cf0e4ef26d...
Unfortunately it forgets to HTML-escape the <wchar.h> etc.
Whoops! Forgot to do that when I switched from a ``` block to raw html