Very cool. Is there a pause button?

No, but you'll come down in about eight hours... LOL.

I like this project--

The layout is well designed--image area, editable code window, and compact navigation--pleasantly proportioned with an excellent demonstration of thematic font choice. And, surprise, some are interactive.

I imagine it's an excellent way to organize and store your collection of animation algos. The 'about' is detailed (https://play.ertdfgcvb.xyz/abc.html#play:about) and interesting to read.

Thanks to OP for sharing.

Ctrl+shift+c lets you copy a frame to clipboard.