# Tk_Gradient_Scatter.py

# Tk_Gradient_Scatter.py

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

ww = 640
hh = 640
root = Tk()
root.title("Tk Gradient Scatter")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.grid()

RGBs = []
def z():
    RGBs.append((r,g,b))
r,g,b = 255,0,0
for g in range(256):
    z()
for r in range(254, -1, -1):
    z()
for b in range(256):
    z()
for g in range(254, -1, -1):
    z()
for r in range(256):
    z()
for b in range(254, -1, -1):
    z()

Lc = len(RGBs)

img = Image.new("RGB",(ww,hh), "white")

while 1:
    pix = []
    inc = 0.002
    yoff = 0
    for x in range(ww):
        xoff = 0
        for y in range(hh):
            rgb = int(random.uniform(xoff, yoff)*Lc)
            # rgb = int((xoff+yoff)/2*Lc)
            pix.append(RGBs[rgb%Lc])
            xoff += inc
        yoff += inc

    img.putdata(pix)
    imgTk = ImageTk.PhotoImage(img)
    canvas.create_image(0, 0, anchor=NW, image=imgTk)
    root.update()