__author__ = 'Su Lei'

import pyglet

window = pyglet.window.Window()

label = pyglet.text.Label('Hello World',
                          font_name='Arial',
                          font_size=36,
                          x=window.width // 2, y=window.height // 2,
                          anchor_x='center', anchor_y='center')


@window.event
def on_draw():
    window.clear()
    label.draw()

pyglet.app.run()


