I saw a post on hackaday about 4-mation and I decided to try and create my own device.
Of course the "flashing bars" don't appear in real life. An Arduino with a motor shield is used to control a bipolar stepper motor and led light strings. The twelve inch diameter turntable rotates at about 60 rpm (one revolution per second). The turntable is divided into 20 sections and a ghost/pumpkin is placed on each section. The led's are "flashed" every 1/20 of a second to provide the illusion of movement.