In this Java game applet tutorial, we will learn the basic principles of programming tile maps, or for our example, looping our image as it scrolls in the background of our game. We only call two drawImage functions but our background will scroll for the entirety of the game, which is pretty awesome. This concept is use quite a bit, so we can reuse one of our resource images (tiles) and connect them making a bigger picture that looks nice for our game.