Flashing Squares During the Optical Art (OpArt) Movement of the 1960s, artists would create all sort of puzzling effects with color. For instance, this flashing squares drawing seems to wobble and flash when you concentrate on one particular area of the image. How many squares can you see in this diagram Can you feel the motion of the image Back to Optical Illusions Other Illusions: Blind ...

Information about Op Art and the artists involved ...