#!/usr/bin/python
# -*- coding: UTF-8 -*-

"""
题目:利用ellipse 和 rectangle 画图。。 
"""

if __name__ == '__main__':
	from Tkinter import *
	canvas = Canvas(width=400,height=600,bg='white')
	left = 20
	right = 50
	top = 50
	num = 15
	for i in range(num):
		canvas.create_oval(250 - right,250 - left,250 + right,250 + left)
		canvas.create_oval(250 - 20,250 - top,250 + 20,250 + top)
		canvas.create_rectangle(20 - 2 * i,20 - 2 * i,10 * (i + 2),10 * (i + 2))
		right += 5
		left += 5
		top += 5

	canvas.pack()
	mainloop()