(square .(checker pos ..(lightness-from-rgb ...(vfloor ....(hsl-from-rgb .....(adjust-hue ......(radius .......(vcos ........(vfloor [1.4809 0.6963 0.989 2.1517]))) ......(rgb-from-hsl .......(y ........(vsin [-0.2124 2.2058 -0.485 1.5829])))))))))