This program needs a webcam to work. It might also work on a tablet or phone if it has a camera on the same side as the screen.
Based on a demo by Mitch during Scratch@MIT 2012. The beetle follows a part of your body which moves (e.g. your head!) Try tinkering with the number of steps moved if the beetle fails to follow. You could also try tinkering with the video motion > value (the number in the green block) What is the best value?