Light Sensor Schematic

I am doing a project for college and I need a circuit diagram of a light sensor that will cause an engine. This engine will also need some kind of sensor to determine when to stop moving. Any help would be greatly appreciated

Go look at the diagram for a garage door Sencor motion detector.

Why are you asking this question in the wrong category? Are you in special ed? because it is the category of special education! Duh!