loop help

[Ben Sizer]

What do you mean by 'it starts accumulating' in this context? Are you
talking about the fact that numbers gain decimal places? Or the fact
that using a number between 0 and 1 will make your values diverge to
infinity? Either way, it's just mathematics for you, I'm afraid, and
there's little Python can do about it. ;)

Which part of the code issues the overflow error? I'm guessing it's the
draw.point() call since that's the only bit I can't test.

-- 
Ben Sizer