(blue-from-hsl .(height ..(hsl-from-rgb ...(checker ....(height .....(vif ......(v* .......(vfrac pos) .......(rgb-from-hsl ........(hsl-from-rgb turbulence))) pos ......(vfrac 1.77))) ....(vmod [-2.3956 -1.6079] .....(vdivide [-0.0204 2.0958 -1.3507 -0.6774] ......(x pos)))))))