Take a good look at the image below. How many circles you see? Or do you see none?
If you think that the image contains only rectangles, you are wrong. In it there is no more than 16 rounds. If I cannot see them, look at the bottom edges of each
In the picture below, you can see some couples to dance lessons, but also some curtains blowing in the wind. You can tell where couples turn into curtains left in the way of wind and reverse?
[url = http://www.youtube.com/watch?v=FaxTRX9oAV4&