Langton's Ant

Calc: TI-83/TI-83 Plus
Shell: ION
Size: 230/235
Author: Dan Englender (TCPA)

How:
	Run the program.  The virtual ants will go running around the screen.  Press an arrow key
to quit.

What:
	Langton's Ant is a simple algorithm created by Chris Langton.  The ants (there are two of
them in this program) run about based on these rules:
--- Each ant moves in the direction it is facing (left, right, up, or down)
--- The ant reverses the color of the point it is currently standing on
--- If the point is now black, it turns 90 degrees to the right
--- If it is white, it turns 90 degrees to the left

That is the extent of the algorithm.  The interesting part is every once in a while the ants will
build a sort of highway.  Also, sometimes the two ants will reverse themselves.  Every time the
program is run, the ants start in random positions, so you get a different picture to look at.