I was bored so I decided to play around with motion sensing for a few minutes, and this is what I ended up with. Click "Allow" when you get a notification asking for permission to use your camera, move around and enjoy!
IMPORTANT: You must have a webcam for this to work. the device your using should preferably be on a stable surface and shouldn't be wiggled or anything, so don't wiggle the table you have it on. The other option is having a completely blank background (one solid color) Might expand on this project later, who knows ;)