#https://www.shadertoy.com/view/XtlXzN

pixels = W:1024 H:1024

x = from -2.0 to 2.0 W
y = from -2.0 to 2.0 H

t = 0.0

d = sqrt(x*x + y*y)
a = atan2(y, x)

gx = abs(fract( a * 1.59 ) - 0.5)
gy = abs(fract( a * 1.59 + 2*d - t) - 0.5)

k = 200*gx*gy

r = 4/k
g = 1/k
b = 2/k
