# Tk_combo_polygons.py

# Tk_combo_polygons.py

from random import shuffle, randrange
from itertools import combinations
from time import time

try:
    from Tkinter import *
except:
    from tkinter import *

root = Tk()
ww = 600
hh = 600
canvas = Canvas(root, width=ww, height=hh, bg='white')
canvas.pack()

t = 30
y = t
outer = [(x,y) for x in range(t,ww,t)]
y = hh-t
outer = [(x,y) for x in range(t,ww,t)] + outer

t = 70
x = t
outer = [(x,y) for y in range(t,hh,t)] + outer
x = ww-t
outer = [(x,y) for y in range(t,hh,t)] + outer
L = len(outer)/2

inner = [(int(x*0.8)+50,int(y*0.5)+145) for x,y in outer]

t = 7
c_inner = combinations(inner[::-3], t)
c_outer = combinations(outer[::-7], t)

for cO in c_outer:
    L = len(cO)
    for cI in c_inner:
        points = sum([[cI[(i+3)%L],cO[i]] for i in range(L)],[])
        t = time()+0.1
        canvas.delete('all')
        canvas.create_polygon(points,fill='yellow',outline='black')
        canvas.update()
        while time() < t:
            0