#https://www.shadertoy.com/view/ll2SW3

pixels = W:1024 H:1024

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

y2 = 1 - y/5

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

k = 1 - smoothstep(0, (0.04 - 0.02 * y)/y2, abs(4 * abs(x - 0.5) - 1 - log2(0.5 * (y + 1))))

r = k
g = k
b = k
