# Tk_shade_pattern.py

# Tk_shade_pattern.py # Red, Green, Blue... and Yellow

from Tkinter import *
from PIL import Image, ImageTk
import random
import math
import time

wt = 255
ht = 255
root = Tk()
root.title("Tk Shade Pattern")
root.geometry("%dx%d+0+0"%(wt,ht))
canvas = Canvas(root, width=wt, height=ht)
canvas.grid()

# create new image
img = Image.new("RGB",(wt,ht), "white")

if 1:
    xy = []
    for x in range(wt):
        for y in range(ht):
            t = x**2-y**2
            xy.append((x%255, y%255, t%255))
    img.putdata(xy)
    imgTk = ImageTk.PhotoImage(img)
    time.sleep(1)
    canvas.create_image(0, 0, anchor=NW, image=imgTk)
    root.update()