Add a way to destroy a group.
Add a way to destroy a group.

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