Color Oled Display animation files

Freetronics sells a nice 128x128 color oled display with a fire animation: Freetronics OLED128 prototype, "flames" demo - YouTube
The animation is on the microSD card in a directory as a series of .bmp files. I believe the Arduino just quickly dumps each .bmp file onto the screen. Does anyone know of software that creates the animation files? I'd like to create my own simple animation.