Using a scrolling image file is the easiest way to get your raspberry Pi displaying something fancy. You could create a whole series of images, or even create images on the fly and then send them to the test program to be displayed.
You may also like to continue the Python experimentation!
About the Author.
As well as contributing lots of tutorials about Raspberry Pi, Arduino and now BeagleBone Black, Simon Monk writes books about open source hardware. You will find his books for sale here at Adafruit.