# Tk_xrange_pixels.py

# Tk_xrange_pixels.py

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

root = Tk()
root.title("Xrange_Pixels")
wi = 400
he = 240
root.geometry("%dx%d"%(wi, he))
w = Canvas(root, width=wi, height=he)
w.pack()

def data_process(y):
    xy.extend([(0,random.randrange(y+15, 255),0) for x in xrange(wi)]) # set the color accordingly
#
img = Image.new( 'RGB', (wi,he))
while 1:
    xy = []
    for y in xrange(he):
        data_process(y)
    img.putdata(xy)
    imgTk = ImageTk.PhotoImage(img)
    #time.sleep(0.02)
    w.create_image(0, 0, anchor=NW, image=imgTk)
    root.update()
#