Pal-Ket , by victor vasarely , 1974 , abstract , Op Art style , Pattern, Circle, Sphere
An image of a blue and green sphere with a square in the middle.
 an abstract art piece. It is composed of different shades of blue and purple. The background is made up of small squares of different colors. In the center of the image is a large circle that is white. Around the circle are smaller squares of various shades of purple and green. The circles are arranged in a symmetrical pattern.