First, the task. Try to implement the task with the blocks that you know and with experimenting with the other blocks and then we'll discuss the solution of this task. So, we want to make the robot move forward, come to us, so that we can give this service robot some instructions how we would like to be served. And then it will spin around and return. Like this.
This is a companion discussion topic for the original entry at http://www.fllcasts.com/episodes/415-ev3-phi-task-for-turning-try-it-yourself