draw Mandelbrot set / requires PIL

mandel.py

import itertools

from PIL import Image

result = Image.new("L", (6400, 6400))

for r, i in itertools.product(range(6400), repeat=2):
    c = complex(r / 1600.0 - 2.0, i / 1600.0 - 2.0)
    z = 0
    print(c)
    result.putpixel((r, i), 255)
    for cnt in range(50):
        z = z ** 2 + c
        if not (-2 < z.real < 2) or not (-2 < z.imag < 2):
            result.putpixel((r, i), int(cnt * 5.12))
            break

result.save('mandel.png')