Image source:

Gif created from Deniz's work:

https://twitter.com/ojelibalon/status/1097116929599422465?s=20

Learning resources

Coding Challenge #13: Reaction Diffusion Algorithm in p5.js

Reaction Diffusion: A Visual Explanation

Reaction diffusion on shader

Editable code examples

Directly in browser:

p5.js Web Editor

Other:

jasonwebb/reaction-diffusion-playground

Technique in action

https://www.youtube.com/watch?v=8Nk0DhAtmgk

https://twitter.com/ojelibalon/status/1097116929599422465?s=20