This is a recreation of a project that I saw on todbots website. It was called “scary shifty servo eyeballs“. Mine just has a face over it made out of cardboard paper. Its a great way to reuse those yellow folders/binders lying around in your office. I used 2 x HXT 500 servos for the eyes and 1 x HXT 900 servo for the neck/face. The code was exactly the same.