[Receiver 2 + Transmitter 1 (Red)]
[Receiver 1 + Transmitter 1 (Red)]
[Transmitter 1 (red)]
[Receiver 1 + Transmitter 2]
[Transmitter 1 (Blue)]
[Receiver 1 + Transmitter 1 (Blue)]
[Receiver 1]
[Receiver 2 + Transmitter 1 (Blue)]
[Receiver 2 + Transmitter 2]