Wireles RS Recieve

rednet.open("back")

while true do

    id, message = rednet.receive()
    --id is equal to the senders id.
    --message is the sent mewssage.

    if id == 28 and message == "Blood" then
        rs.setOutput("left", false)
    else
        rs.setOutput("left", true)
    end

end