[ComputerCraft] Remote Redstone (with PW) [receiver]

--Reciver

--Wirelessmodem (currently at the top)
rednet.open("top")
--startmode (true = on; false = off)
starton=false

if starton == true then
    redstone.setOutput("back", true)
end

while true do
    event, id, message, distance = os.pullEvent("rednet_message")
    if message == "on" then
        redstone.setOutput("back", true)
    elseif message == "off" then
        redstone.setOutput("back", false)
    elseif message == "question" then
        if redstone.getOutput("back") == true then
            rednet.send(id,"on")
        else
            rednet.send(id,"off")
        end
    end
end