# -*- coding: cp1251 -*-
import time
from Tkinter import *
tk = Tk()
c = Canvas(tk, width=300, height=300, bg="white")
c.create_line([(5, 55), (250, 55)], arrow=LAST)
time.sleep(1)
c.create_line([(5, 155), (250, 155)], arrow=LAST)
time.sleep(1)
c.create_line([(5, 255), (250, 255)], arrow=LAST)
c.pack()
tk.mainloop()