Optical art by Gianni Sarcone Focus on the ball at the center of the image above. The scene appears to vibrate. If you move your head slightly forward and backward, the color fields of the rosette appear to pulsate.
I know why this works!!! On the floor it has shadows and lights, and on the walls there are two lights. The floor has shadows on it where there shouldn't be because of the fact the other light is right next to it while both lights are on. -ZEE BADGER