(rgb-from-hsl .(vconcat agate ..(v- ...(length ....(red-from-hsl .....(offset ......(length [-2.7759 1.2398 -0.9438 1.8875]) vsnoise))) ...(height-normal ....(theta .....(rotate ......(hsl-from-rgb 0.6395) [2.202 -0.1947]))))))