So you are looking for a special project just for Halloween? Building a motion tracking Michael Myers is one way to keep your neighbors on their toes. wmartin-1 has shared a simple guide that shows you how to do just that. This motion tracking dummy was programmed in Python. You are going to need a webcam, an Arduino Duo, a mask, a pair of dickies and a few parts to get started.
You can always get creative and add more features to your own version. The parts and instructions are available here.