(checker 
.(z 
..(alpha 
...(length 
....(red-from-hsl 
.....(y 
......(square 
.......(vround 
........(scale spots 1.9718)))))))) 
.(v* 
..(vdivide 
...(green-from-hsl 
....(v+ 
.....(length vnoise) 
.....(max-component 
......(vcos -0.2714)))) [2.1018 -0.737 1.0412]) 
..(vsin 
...(square 
....(vround pos)))))