#http://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/procedural-patterns-noise-part-1/simple-pattern-examples

pixels = W:512 H:512

x = from 0 to 8 W
y = from 0 to 8 H

k = tex_fbm2(x, y)

#r = sin( k*12*PI)*0.5 + 0.5
r = abs(sin(x*6 + k*10))
g = r
b = r
