Where can I find tutorials on creating animation on the site?

Question

css

I write websites.... I practice, but css is not enough. I would like not just to make an animation, but some kind of dynamic background, consisting of objects that are broken into polygons, and then reassembled into one. As if I would have typed in Google, but .... I formulated everything badly.
Kst animation by type https://vintage.agency/, on the main page

Answer 1

https://htmlacademy.ru/program
https://www.youtube.com/watch?v=YWjuEzhPYqs&t=3944s