(normalize .(hsl-from-rgb ..(checker ...(v* [1.8433 -2.3538 0.8475 0.1357] ....(scale .....(vsqrt ......(offset pos [1.5891 0.4114 -1.0459 -0.0858])) grain)) ...(saturation-from-rgb ....(scale .....(vmod ......(v+ .......(alpha [-0.215 2.8681 1.3841]) [-2.1463 2.4099]) -2.7286) .....(square ......(checker .......(average spots [-2.8602 0.7087 1.2401]) [-0.7598 0.5416])))))))