From the Author:
Warning, this experiment is surely not for the epileptics!
Scale the previous render output to zoom in, add some noise, subtract the difference with its own blurred version, and repeat that for every frame.
With Reaction-Diffusion systems (Bio-)Mathematicians usually describe the development of skin dots on plants and animals. Delve into ever changing color fields here.
WebGL Shaders: (1) two-pass Gaussian blur shader, (2) feedback shader, (3) presentation shader ... See wikipedia for "Reaction-Diffusion"