Add sample code for interacting with files.
Add sample code for interacting with files.

MrJoy/audio_playground,MrJoy/flux-hue,MrJoy/audio_playground,MrJoy/sparkle_motion,MrJoy/flux-hue,MrJoy/audio_playground,MrJoy/sparkle_motion,MrJoy/flux-hue,MrJoy/sparkle_motion