You need a Java-enabled web browser to play this game.

Wrapping is primarily intended as a visual representation of a wrapped buffer. The left view is the buffer as it is normally shown, the right view shows what goes on "behind the scenes". The colored rectangles show how the different buffer pieces are assembled. Wrapping also shows why the buffer size needs to be a multiple of the tile size.

You can type "debug" to see exactly how much of the pixel buffer is updated each frame.