shutdown

rednet.open("top")

local autoShutoff = 0
local lastAutoShutoff = 0

function HandleReceivedData()
    local sender, message = rednet.receive();

    if string.find(message, "<off") then
        rs.setOutput("back", false)
    else
        rs.setOutput("back", true)
    end
end

function MainLoop()
    while true do
        HandleReceivedData()
        lastAutoShutoff = autoShutoff
    end
end

MainLoop()