circle.py

import Image, ImageDraw
from random import randint

def draw_picture(output_filename):
    print('drawing: {}'.format(output_filename))

    image = Image.new('RGB', (640, 480), 'black')
    draw = ImageDraw.Draw(image)

    for i in xrange(0, 640, 20):
        for j in xrange(0, 480, 20):
            draw.ellipse(
                (i + 1, j + 1, i + 19, j + 19),
                fill='hsl({}, 100%, 50%)'.format(randint(0, 256)),
                outline='white')

    image.save(output_filename)

for img_id in xrange(30):
    draw_picture('circles-{}.png'.format(img_id))