#https://www.shadertoy.com/view/4tsXRS

pixels = W:1024 H:1024

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

a = atan2(y, x)
d = length2(x, y)

k = 4 - 4*d

power = 4
k = k+1.5 / power * value_noise2(power*x, power*y)

power = power*2
k = k+1.5 / power * value_noise2(power*x, power*y)

power = power*2
k = k+1.5 / power * value_noise2(power*x, power*y)

k = k*0.6

r = k
g = pow(max(k,0),2)*0.4
b = pow(max(k,0),3)*0.15
