pixels = W:1024 H:1024

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

f = 20
kx = xor_value_fbm2(x*f, y*f)
ky = sin_value_fbm2(x*f, y*f)
kx1 = xor_value_fbm2(x*f + 4*y*kx, y*f + 4*y*ky)
ky1 = sin_value_fbm2(x*f + 4*y*kx, y*f + 4*y*ky)
k = xor_value_fbm2(x*f + 4*y*kx1, y*f + 4*y*ky1)

w = smoothstep(0.1, 0.9, x)
h = x + w*(k*0.5 + 0.5)

c = tex_color_fbm2(h*8, 100)
r = parse_red(c)
g = parse_green(c)
b = parse_blue(c)

