"What we've done is created a device that automatically moves that laser beam across a specified target area — in this case, your field — at regular intervals all night long." [fourth year mechanical engineering student Peter] Rashleigh says the device is very low power — even less powerful than most hand-held laser pointers used during presentations — and it can shut itself off to make sure planes aren't impacted. He says farmers just need to program the corners of their fields for the device, and then it does the rest.