(length .(offset ..(polar ...(height ....(rgb-from-hsl .....(polar ......(vmin .......(cross3 ........(height-normal pos) pos) 2.7474))))) ..(saturation-from-rgb ...(vmod ....(vsin .....(vpow pos ......(lightness-from-rgb .......(blue-from-hsl ........(rgb-from-hsl [0.0727 -2.029]))))) ....(v+ vplasma [0.2919 -2.9692 2.9413 -1.1705])))))