Entirely based on Jared Tarbell's program Fractal.Invaders, 2004.
Exerpt from "Processing Handbook" by B.Fry & C.Reas:
"Fractal.Invaders begins with a rectangular region and recursively fills it with little 'invader' objects.
Each iinvader is a combination of black squares arranged in a 5x5 grid generated at random during runtime. The only rule of construction requires that the left side of the invader be a mirror copt of the right side."