Tech tip - good CSS animations

I like the CSS animations by Yusuke Nakaya at 'codepen.io/YusukeNakaya'.

I have changed two to use JavasScript for the random bits rather than a CSS pre-processor. They are the 'Paper Birds' and 'Birds' at: 'codepen.io/Bert-Beckwith'.

I use these as background animations for my game.

I learn about CSS as I change them

There are more tips at: bbingo.xyz/t