Here some actual equations, diffusion, after my bro came up with some diffusion problems, about the back-sides of paintings, and showcases in museums. The really cute part of it is that it "reads" a picture, interprets black as walls and diffuses the other colours. So any complicated geometry is dealt with within the code. (Give me a picture with black walls and a starting condition, and my program returns an animation.)
I wanted to keep it integer as well, but then there is leakage of colour which is hard to fix (physically), with reals that is under control. A hopping-type code could be integer, but that is bloody slow, and random number generators give me the creeps.
For a company of problem solvers, that, one day, will take over the market.
This started as a B/W photo, I quantified the colours and diffused the gray tones. It never made the conference site. The letters suffered separately the same faith and were superimposed, with a little "merge program".
Mondrian meets Steel City. Mondriaan is his real name, he is from my neck of the woods, (east Netherlands, I used to play in "Forest near Oele," which he painted in funny colors before he got square.)
This is what happens if colours fall of the edge.
Colour space is three dimensional, any palette is just a projection, so there is no obvious "right" one. A handmade colour circle, full hue on the middle circle. Black to white fom inside to outside. Better in JPG than gif due to the full colour range.