Wall Drawing #630 (1975)

Six-part drawing. The wall is divided horizontally and vertically
      into six equal parts. 1st part: On red, blue horizontal parallel lines,
      and in the center, a circle within which are yellow vertical parallel
      lines; 2nd part: On yellow, red horizontal parallel lines, and in the
      center, a square within which are blue vertical parallel lines; 3rd part:
      On blue, yellow horizontal parallel lines, and in the center, a triangle
      within which are red vertical parallel lines; 4th part: On red, yellow
      horizontal parallel lines, and in the center, a rectangle within which
      are blue vertical parallel lines; 5th part: On yellow, blue horizontal
      parallel lines, and in the center, a trapezoid within which are red
      vertical parallel lines; 6th part: On blue, red horizontal parallel
      lines, and in the center, a parallelogram within which are yellow
      vertical parallel lines. The horizontal lines do not enter the
      figures.