Random Distribution of 40,000 Squares Using the Odd and Even Numbers of a Telephone Directory (detail) , by francois morellet , 1971 , abstract , Op Art style , Pattern
A red and blue image of a square pattern.
 a square. It is made up of small squares. The squares are red and blue. The blue squares are smaller than the red ones. The red squares are larger than the blue ones. There are small squares in between the blue squares. There is a white border around the image.