# Tk_RGB_random_scroll.py

# Tk_RGB_random_scroll.py

from tkinter import *
from PIL import Image, ImageTk
from math import sin, cos, radians
import random

ri = random.randint

ww = 600
hh = 600

root = Tk()
root.title("Tk_RGB_random_scroll")
root.geometry("%dx%d+0+0"%(ww,hh))

canvas = Canvas(root, width=ww, height=hh)
canvas.pack()

image = Image.new("RGB", (ww,hh), (255,255,255))

scan = [[128,128,128] for i in '.'*ww]

def rgb2hex(r,g,b):
    return '#%02X%02X%02X'%(r,g,b)

def draw():
    image.putdata(rgb)
    photo = ImageTk.PhotoImage(image)
    canvas.create_image(0,0,image=photo,anchor=NW)
    canvas.update()

rgb = []
def main():
    global rgb
    i = 0
    while len(rgb) < ww*hh:
        i = core(i)
        draw()

    while 1:
        rgb = rgb[ww:]
        i = core(i)
        draw()

peak = 60
def core(i):
    for j in range(ww):
        p1 = scan[j-2]
        p2 = scan[j-1]
        p3 = scan[j]
        color = []
        for k in [0,1,2]:
            t = int((p1[k]+p2[k]+p3[k])/3)
            t += ri(-peak,peak)
            if t < 0: t = 0
            elif t > 255: t = 255
            color += [t]
        scan[j-1] = tuple(color)
    rgb.extend(scan)
    return i

main()