I made a generative art system that generates random expressions made of functions (sin, exp, mod, etc.), variables x/y and p/q (polar coordinates), and constants you can set and animate. The outputs are highly variable.

You can press P to animate all constants at the same time and N to quickly generate new programs.

Presets don't work the same on all devices because GLSL is not deterministic and depends on the GPU.

One interesting thought is that if intelligent alien life exists out there and their vision works similar to ours they might have looked at outputs just like these at some point.