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

pixels = W:1024 H:1024

x = from -4 to 4 W
y = from -4 to 4 H

t = 113.2

gx = atan2(x, y)*1.59
gy = length2(x, y)*2*1.59
gx = gx*floor(gy)
gx = gx + fract(gy)*sin(t)*4.0 + floor(gy)*t
gx = fract(gx) - 0.5
gy = fract(gy) - 0.5
d = gx*gx + gy*gy

r = 0.06/d
g = 0.1/d
b = 0.04/d


