Artomata is a small python program to make big GIF files of Elementary Cellular Automata.
For more on Elementary Cellular Automata, see http://mathworld.wolfram.com/ElementaryCellularAutomaton.html
This program is very bare-bones, which means that it probably won't do what you want it to, but it should be simple to build on to meet your needs.
You can get a copy of it by checking out the git repo at this URL (right-click, copy URL, then 'git clone' it)
That's about it.