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

pixels = W:1024 H:1024

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

t = 10.23

sum = 0.0
amp = 1.0
[loop start:4
sum = sum + iq_noise3(x*amp, y*amp, t*amp)/amp
amp = amp * 2
loop end]

freq = 0.25
amp = 16.0*0.85
xPeriod = 8.0
yPeriod = 4.0
zPeriod = 2.0

k = abs(sin(freq *(x*xPeriod + y*yPeriod+ t*zPeriod + amp*sum)))

r = k
g = r
b = r
