Generative Vasarely

Original artwork: Viktor Vasarely - Zebrák
It's been generated with code in browser using #p5js and #canvas.
check out some examples here: http://dfeles.github.io/HackPact/Day-8/
I'm using a particle system. This means I set up a bunch of dots/lines/whatever and I move them with preset rules like: go downward and if the colour changes turn somewhere.
Fun happens if you create hundreds of points at random locations and you make each one of them a little unique using random numbers.
It becomes a vivid void moving randomly, yet you see some kind of pattern emerging. In this case the image becomes visible.
Sometimes these rules get so complex, I don't even know what's happening but the outcome surely looks fun.