First things first, YOU WILL NEED A WEBCAM FOR THIS PROJECT. Wait 3 seconds for it to load. This uses a track to guide it. The track is made of small dots. When the pencil detects motion, it hops to the dot closest to the motion. So for this to work at its best, Make sure you are in a well lit room and there is no motion around you. Like no one walking by, no fans on, or even bugs flying near the camera. The best place would be in your room in a corner with the fan off and the lights on. I added a sensitivity slider because some peoples webcam frame rate is faster, or slower than others. 99 is about perfect for me. It just takes some time trying different ones.