Atmosphère chromoplastique N° 381 , by luis tomasello , 1975 , sculpture , Op Art style
A piece of paper with a grid pattern on it.
 a square with lines on it. The lines on the white background are thin and evenly spaced. There is a rectangle in the middle of the image that is made up of small squares. The squares are brown in color and are arranged in a grid-like pattern. The image has a black border around the edges.