pixels = W:1024 H:1024

x = from 0 to 16 W
y = from 0 to 16 H

k = abs(gradient_noise2(x*1, y*1))*0.5
k = k + abs(gradient_noise2(x*2, y*2))*0.25
k = k + abs(gradient_noise2(x*4, y*4))*0.125
k = k + abs(gradient_noise2(x*8, y*8))*0.0625
k = k + abs(gradient_noise2(x*16, y*16))*0.03125

k = sin(k * 2.5 + x + y*2)

r = k*k
g = r
b = r
