A simple and rather crude Piet Mondrian-style painting generator.
Click to generate a new painting
Note: going through the preview images before I uploaded, I'm not sure if I saw some Mondrian generators already. I apologize to any Processing artists who already posted something similar to this as I did not mean to copy the idea, even though I believe my code to be wholly original and without using any reference to other code.
To tweak this sketch, first download it.
Make your updates, then upload your tweak!