pixels = W:1024 H:1024

x = from 0 to 1023 W
y = from 0 to 1023 H

a = 512
b = 512

k = sqrt((x - a)*(x - a) + (y - b)*(y - b))

c = palette_iq04(k/24)
r = parse_red(c)
g = parse_green(c)
b = parse_blue(c)