AUTONOMOUS. “Vicsek’s drones are free in their movements. Tell them to form a rotating ring, or a straight line, and they’ll coordinate themselves into the right position. Tell them that they’re heading towards an imaginary alleyway, and they’ll queue up to squeeze through a gap.”
http://phenomena.nationalgeographic.com/2014/02/27/a-bird-like-flock-of-autonomous-drones/