Soto arrived in Paris, from Venezuela, in 1950. He was one of a number of Paris-based artists to be given an exhibition at Signals. Both reliefs shown here were included in an exhibition at the gallery in 1965. Soto wanted to create a purely abstract art, and developed a vocabulary based on repeating and superimposing straight lines, squares, and circles. The contrast between the monochrome planes and striped background creates an optical effect and the black and silver squares appear to be in motion.