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

pixels = W:1024 H:1024

x = from 0 to 4 W
y = from 0 to 4 H

px = mod(x * 8.0, 4.0) - 2.0
py = mod(y * 8.0, 4.0) - 2.0

h = length2(px, py)

k =  sin(h*16)

r = k
g = k
b = k
	


