With some similarities to the old Game of Life excercise, this is a morbid and somewhat terrifying page that generates a city and populates it with humans and some zombies. The humans are fast, the zombies are slow and each have a few basic rules to govern their behavior. Watch as the zombies slowly take over the city.
BONUS LINK! Ok, I loved this thing so much that I wrote my own version just to play with the rules. Zombies! Zombies! Zombies!