gistfile1.py

import Image

img = Image.new('RGB', (512, 8))
pix = img.load()

for x in range(512):
	for y in range(8):
		if x >= 256:
			pix[x, y] = (255, 255, x - 256)
		else:
			pix[x, y] = (x, x, 0)

img.save('image.png')