Drone display light

Hello everybody
I want to build many drones to display light.
What are the components needed to build?
What method will we use to connect them so that we can synchronize control?
please help me

There’s one example here: https://github.com/ugcs/ddc
Wifi is often used as the datalink, or something like http://ardupilot.org/copter/docs/common-telemetry-robsense-swarmlink.html