Purple Thrust , by jack bush , 1974
An abstract painting with a green background and a blue and pink rectangle.
A piece of artwork is displayed on a white piece of paper. The paper has a green background that has some brush strokes on it. In the center of the paper is an abstract painting. The painting is composed of blue, orange, and pink colors. The blue part is in the middle and the orange part is on the bottom. There is a white part at the top of the blue part.