Just put and move your hand front of the camera.
And then, the magic pet will follow it!

Warning! For better results while using this software,
please, be aware of the following recommendations :

- Use it, in a place, well lit by white light.
- Move your hand in front of a black or white wall.
- Wear monochrome clothing, white or gray.
- Wear long sleeves.

Screenshots: 

Video: