Untitled , by roberto aizenberg , 1975 , Hard Edge Painting style
A painting of a red and black circle on a brown background.
A circle is in the center of the picture. The circle is red and black. There are many black lines in the circle. The lines are arranged in a fan-like pattern. The background is a light brown color. The bottom of the circle is a darker red color. There is a thin white line on the bottom right corner of the painting.