Scaling circle rings

A 15 minute project I made based on the following gif

https://33.media.tumblr.com/41027f54a798ef6f6e22f0f449c33f45/tumblrnd7cjkSXD01qdac8co1500.gif

Prefixfree Normalize

A A

(Errors from your JS or Pre-Processors code)

HTML

CSS

JavaScript