(green-from-hsl .(checker ..(v- ...(lightness-from-rgb ....(length .....(y ......(height [1.8016 -1.9783])))) ...(gradient ....(sigmoid .....(normalize ......(blue-from-hsl 2.7286))))) ..(theta ...(height ....(dot [1.7441 -2.2521] .....(vcos pos))))))