#https://www.shadertoy.com/view/XlB3R3

pixels = W:1024 H:1024

x = from 0 to 1 W
y = from 0 to 1 H

k = iq_fbm2(x*8, y*0.8)
k = fract(k*20)

r = mix(0.5, 0.75, k)
g = mix(0.1, 0.4, k)
b = mix(0.1, 0.2, k)

