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

pixels = W:1024 H:1024

x = from 0 to 1 W
y = from 5 to 0 H

x = x*exp2(ceil(y))/2
x = fract(x)
y = fract(y)

k = 1 - smoothstep(0, 0.2 - 0.1 * y, abs(4 * abs(x - 0.5) - y))

r = k
g = k
b = k
