Bad Apple demo on a Casio fx-CG50 calculator.
Go to the releases page and download both badata.bin and BACG50.g3a. Copy both to the same directory on your calculator.
Run the 'Bad Apple!!' add-in to run the demo. Hold the exit button to exit. If you want to re-open the program, you may need to open a different program before switching back to Bad Apple.
See the PrizmSDK setup guide.
Once you have that set up, set the environment variable FXCGSDK to the where you put the SDK.
See the compression folder for details on how to compile that.
See the compression folder for details on how to compress a video and how it works.