Open the first file in the demo (01_lincolnkitty_basics.py) in a Python editor. This editor might be Idle, which usually comes with Python, your own favorite development environment, or even just a simple text editor.
This file is the skeleton from which you can build just about any prototype. It loads up the pygame and other important modules, creates a main function, sets up the screen, and start running (although only briefly, since nothing is happening yet.)
The most important thing to observe here is the "while" statement. This is the "main loop" of the application. It will repeat, over and over again, for every frame of the game sent to the screen (which we've set to be updated at 60 frames per second.)
Think of this like an animation--frames go to the movie screen one at a time, creating motion through our persistence of vision. This works the same way, but with the added possibility of controlling that movie. We'll look at that next.