N (iterations):
ms between animation frames: iterations per frame:
Origin at center
Origin at top left

Reverse white and black
(will reset the pattern and possibly the program)

Paintfuck is a Smallfuck variant (which is, in turn, a Brainfuck variant) with a 2D data area instead of 1D. It adds two new commands for the added dimension and replaces Smallfuck's < and > with letters. The commands are:

The spec stipulates that any letter not among these should be ignored. The data area is toroidal in this interpreter. Ones are shown as black cells and zeros as white ones.

Written by Pedro Gimeno. Pedro Gimeno's personal page