Hi Rod, Darth was just a little joke.
About the two others: BALL1.bmp was the one I was looking for. But BALL2 is also very nice. Well, now I would need a function which allows you to toggle between them: If it's dark outside use BALL1, if it's bright day use BALL2. But as long as this function doesn't exists I would go for BALL1. Thanks a lot again.
Regards Ingo