# Tk_mosaic.py

# Tk_mosaic.py

from Tkinter import*

from PIL import Image, ImageDraw
from random import randint

ww = 600
hh = 600
root = Tk()
root.title("Tk Mosaic")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.grid()

def rgb2hex():
    return '#{:02x}{:02x}{:02x}'.format(r,g,b)

SQUARE_SIZE = 8

for y in range(0, hh, SQUARE_SIZE):
    for x in range(0, ww, SQUARE_SIZE):
        r,g,b = [randint(0, 255) for _ in 'rgb']
        canvas.create_rectangle([(x, y), (x + SQUARE_SIZE, y + SQUARE_SIZE)], fill=rgb2hex())

canvas.update()