formation flying

A friend described a night-time opening ceremony where lit up drones moved in formation, creating shapes in the sky, then 'splitting off' unlit to create other shapes and appear lit again .... so my question is does anyone know whether the group would have been controlled by a...

I was in San Diego this past weekend and my buddy who also has a DJI Phantom 3 Professional quadcopter and I went to do some formation flying over a part of the San Diego bay. It was loads of fun! Check out the video!