Bump. I never posted my Java implementation of the generalized version of Langton's Ant (that I use a variation of for my browser-breaking signature), so here it is:
Refresh your browser a few times if you're bored. It takes maybe 15 attempts on average to get something particularly interesting.
Relatively short rules tend to result in interesting geometric patterns, like this (whereas long ones tend to produce smooth hue gradients):
Take a screenshot of your findings and post them!
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram