geoMAD by Paul Murdaugh is a neat little program that draws a picture of Alferd E. Neuman line by line, so you can watch it happen in realtime.  The original program came from issue 258 of MAD Magazine (October 1985) and was a program listing for BASIC 2.0 on the Commodore 64.  Paul Murdaugh re-wrote the program using geoBASIC for all of us GEOS nerds to enjoy and show off to our friends.