mob_farm_receive

local modem = peripheral.wrap("back")
modem.open(00005)

redstone.setOutput("right",true)

term.clear()
term.setCursorPos(1,1)
print("Waiting on message.")

while true do
    local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")

    term.clear()
    term.setCursorPos(1,1)
    print("Message received: "..message)
    print("Channel: "..senderChannel)

    if senderChannel == 5 and message == "off" then
        redstone.setOutput("right",false)
    elseif senderChannel == 5 and message == "on" then
        redstone.setOutput("right",true)
    end
    sleep(0.1)
end