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

pixels = W:1024 H:1024

x = from -1.0 to 1.0 W
y = from -1.0 to 1.0 H

t = 4.0
a = length2(x, y) - 2.0 / length2(x, y) - t
rx = rotate2d_x(x, y, a)
ry = rotate2d_y(x, y, a)

k = 0
[loop start: 5
s = pow(2.0, loop)
k = k + abs(xor_value_noise2(s * rx, s*ry))
loop end]

r = k*0.08
g = k*0.2
b = k*0.4
