Contrasti simultanei , by mario ballocco , 1973 , abstract , Op Art style , Pattern, Circle, Pink, Rectangle, Polka dot
A piece of artwork that has pink circles on a blue and green background.
A square of squares is on a black background. The squares are divided into four sections. The first section is blue. The second section is green. The third section is yellow. Each section has a pink circle in it. The circles are evenly spaced.