The sprite sheets are a series of images that are merged together in a single bitmap. Each section in the image is a single frame of the animation that gets played from top to bottom.
It’s really easy to play new animations by just tossing new bitmaps onto the drive. The code automatically cycles through all of the images stored in the bitmaps folder.
Download the bitmap images below for your testing. These are pre-made sprite sheets of the infamous party parrot and nyan cat.