Animation test

# coding:utf-8
from tkinter import *
from time import sleep

class Animation(Tk):
    def __init__(self):
        super(Animation, self).__init__()
        self.title("Animation test")
        canvas = Canvas(self, width=500, height=400)
        canvas.pack()

        # TOP, BOTTOM, LEFT AND RIGHT SIDE LINES
        canvas.create_line(0, 5, 500, 5, fill='red')
        canvas.create_line(0, 400, 500, 400, fill='red')
        canvas.create_line(2, 5, 2, 400, fill='red')
        canvas.create_line(500, 5, 500, 400, fill='red')
        # REST
        self.rect = canvas.create_oval(100, 100, 50, 50, fill='black')
        current_pos = canvas.coords(self.rect)
        display_pos = canvas.create_text(70, 20, text=current_pos)
        display_hit = canvas.create_text(165, 20, text='Nothing')
        xspeed = 1
        yspeed = 2
        while 1:
            canvas.move(self.rect, xspeed, yspeed)
            pos = canvas.coords(self.rect)
            canvas.itemconfigure(display_pos, text=pos)
            if pos[3] >= 400 or pos[1] <= 0:
                yspeed = -yspeed
                canvas.itemconfigure(display_hit, text='Hit Y', fill='red')
            if pos[2] >= 500 or pos[0] <= 0:
                xspeed = -xspeed
                canvas.itemconfigure(display_hit, text='Hit X', fill='green')
            self.update()
            sleep(0.01)

        self.mainloop()

Animation()