Untitled , by rubem ludolf , abstract , Concretism style , Rectangle
An abstract painting with green, yellow, blue, and black squares.
 an abstract art piece. It is composed of four squares. The first square is green, the second is yellow, the third is black, the fourth is light blue, and the fifth is dark blue. The squares are arranged in a diagonal pattern. The background of the image is white. There is a signature in the bottom right corner that is not visible.