Bortnyik Sándor, 1921 , by sandor bortnyik
A painting of a yellow, blue, red, orange, and green geometric design.
 an abstract painting. The painting is composed of squares of different colors. The first square is orange, the second one is yellow, the third one is green, the fourth one is blue, the fifth one is red, and the last one is brown. There is a large number "31" on the bottom right of the painting.