For our demo, we set up several Spark Cores with force sensors and RGB LEDs to show the established connections. There are three states for a platform:

State 0 (Red): No one sitting on platform

State 1 (Purple): Someone sitting on platform waiting for a connection

State 2 (Green): Connected with another person on another platform

All platforms start in state 0. When a person sits on a platform, they enter state 1. When another person sits on a another platform, a connection is made and both platforms enter state 2. When a person leaves, their platform returns to state 0, and their partner’s platform either enters state 1 if that person is waiting for another connection or state 0 if that person leaves as well.