hahathere's programs that will do it for you, animated if you want.
(
Bloop Fri 16 Jul, 22:10,
Sat 30 Aug 2008, 23:37,
archived)
that's cheating!also, i don't need them as i own a camera and control the weather.
(
postbear has metal knees,
Sun 31 Aug 2008, 0:11,
archived)