Johannes, can you READ?
The page you linked to contains a perfectly clear and logical explanation of the illusion.
If you can't be bothered to read, or can't understand that, there's no point in any of us posting an alternative. You would equally fail to read or understand it, as has been the case for all your "questions" in the past.
Do us a favour and go count the rivets in the bellmouth of the Delta 2 around 2:02:23 p.m. Monday...