quick wireless program

local senderId, message, distance

function netClose()
        rednet.close("right")
end

function netOpen()
        netClose()
        rednet.open("right")
end

function getData()
        senderId, message, distance = rednet.receive()
end

while true do
    netOpen()
    getData()
    if message == open then
        redstone.setOutput("top", true)
    else
        redstone.setOutput("top", false)
    end
sleep(1)
end