The automatic garage door closer was inspired by the gut wrenching feeling one gets when they realise their garage door is wide open, has been since they left home, and will be until they return.  The model is designed to illustrate the idea that the Arduino would be connected into the garage door system.  Hypothetically, after a set amount of time that the sensors in the system have not detected movement, the servo will be triggered; thus hitting the button to close the door again.  With this, ideally one will never have to panic about a possible, unmonitored garage sale, again.