pixels = W:1024 H:1024

x = from -3 to 3 W
y = from -3 to 3 H

s = 1
w = 0.5
k = noise_2d(x*s, y*s)
r = abs(k)*w

s = s*2
w = w/2
k = noise_2d(x*s, y*s)
r = r + abs(k)*w

s = s*2
w = w/2
k = noise_2d(x*s, y*s)
r = r + abs(k)*w

s = s*2
w = w/2
k = noise_2d(x*s, y*s)
r = r + abs(k)*w

s = s*2
w = w/2
k = noise_2d(x*s, y*s)
r = r + abs(k)*w

r = r*1.5

g = r
b = r
