# Tk_tablecloth_ripple.py

# Tk_tablecloth_ripple.py

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

root = Tk()
root.title("Tk Tablecloth Ripple")
root.geometry("500x500")
wi = 500
he = 500
w = Canvas(root, width=wi, height=he)
w.pack()

img = Image.new( 'RGB', (wi,he))
cols = {}
xy = []

DIM = 500

def r(i, j):
    s=3./(j+120)
    y=(j+sin((i*i+sqrt(j))/100./DIM)*100)*s
    return (int((i+DIM)*s+y)%2+int((DIM*2-i)*s+y)%2)*127

def g(i, j):
    s=3./(j+120)
    y=(j+sin((i*i+sqrt(j))/100./DIM)*100)*s
    return (int(5*((i+DIM)*s+y))%2+int(5*((DIM*2-i)*s+y))%2)*127

def b(i, j):
    s=3./(j+120)
    y=(j+sin((i*i+sqrt(j))/100./DIM)*100)*s
    return (int(20*((i+DIM)*s+y))%2+int(20*((DIM*2-i)*s+y))%2)*127

for y in range(DIM):
    for x in range(DIM):
        c = '#%02x%02x%02x' % (int(r(x, y)),int(g(x, y)),int(b(x, y)))
        w.create_line((x, y, x+1,y+2),fill=c)
    root.update()