Here's my first parrot program! It implements a cellular automata like those described in Stephen Wolfram's latest and weightiest tome, A New Kind of Science.
http://andywardley.com/parrot/automata.html The book is pretty good. Lovely pictures, clever stuff. A bible on cellular automata with some deep insights into the nature of nature. It weighs in 1200 pages and 50-odd quid, but it's worth it if you're interested in such things. Time will only tell if it is indeed a new kind of science... A