#https://www.shadertoy.com/view/4dGGzD

pixels = W:1024 H:1024

x = from -1 to 1 W
y = from -1 to 1 H

dist = sqrt(x*x + y*y)*16
angle = (atan2(y, x) + PI)/PI*16

t = 1.568

ar = angle + dist*sin(t)

vx = mod(ar, 2) - 1
vy = mod(dist, 2) - 1

k = 1 - 0.1/(vx*vx + vy*vy)

r = k
g = k
b = k
	
