A POKE CHEER
Here's something you probably didn't know was tucked away inside your Atari.
10 S=53760:POKE S,230:POKE S+1,175:POKE S+2,231:POKE S+3,175:POKE S+4,229:POKE S+15,3
20 FOR X=0 TO 255.49 STEP 0.135:POKE S+8,X:NEXT X:GOTO 20
from antic magazine, volume 4, number 8, december 1985
try it, it's fun. i remember being impressed back then, and i'm still impressed by this bit of silliness.
EDIT: for those lacking a real atari 8-bit or emulator (thanks to jerronimo:
check out an mp3 i encoded. it loops like that until the program is killed. the click-click-click-click at the start is me typing "run