This tutorial shows how Actors are instantiated and how they communicate with each other. A PongActor is instantiated as a service on CPU core #2, then a PingActor is instantiated on CPU core #1. A TravelLogEvent is sent from Ping to Pong and back to Ping, recording its location at each stop.
The workflow terminates after a hardcoded number for seconds; see tutorial #9 for a better and more elaborate exit procedure.