Pyglet - simple example

First i wanted to make a simple example. Then I saw George Oliver googlegrups question. This made me change my little script.Official Site address is: www.pyglet.org.
Documentation of this module is to: www.pyglet.org/documentation.html.
There is also a Google group for this mode where you can ask questions.
My example does nothing more than:
- Create a fereasta;
- To put a background color;
- Displaying an image.
Image i use it, name it "20000.jpg" is this:

Put in folder with your script.
In the future I will come with more complex examples.
Change the following sequence of lines of code example:

  win.clear ()
  img1.blit (5, 5)

You will see that the order matters for pyglet.
Who studied OpenGL knows why.

import pyglet
from pyglet.gl import *
#set colors with red,green,blue,alpha values 
colors = {
            'playfield' : (255, 255, 255, 255),
            'red' :       (255, 0, 0, 255,0),
            'sub_red' :   (255, 50, 20, 255),
            'green' :     (0, 255, 0, 255),
            'sub_green' : (20, 255, 50, 255),
            'blue' :      (0, 0, 255, 255),
            'sub_blue' :  (20, 50, 255, 255)} 
#give img1 the place of image 
img1= pyglet.image.load('20000.jpg')
#w , h the size of image 
w = img1.width+15
h = img1.height+10
# create the 640x480 window size
win = pyglet.window.Window(640, 480, resizable=True, visible=True)
#or use next line to see with size of image 
#win=pyglet.window.Window(width=w, height=h)

# set caption of window
win.set_caption("TEST")
#use * to unpack tuple and set background color 
pyglet.gl.glClearColor(*colors['red'])

@win.event

def on_draw():
 win.clear()
 img1.blit(5, 5)
# to run application 
pyglet.app.run()

If you use the code line:

win = pyglet.window.Window(640, 480, resizable=True, visible=True)

you see:

If you use the code line:

win=pyglet.window.Window(width=w, height=h)

you see: