Town Lights Receiver

--Peripheral Wrapper
local function open()
    local bOpen, sFreeSide = false, nil
    for n,sSide in pairs(rs.getSides()) do
        if peripheral.getType( sSide ) == "modem" then
            sFreeSide = sSide
            if rednet.isOpen( sSide ) then
                bOpen = true
                break
            end
        end
    end

    if not bOpen then
        if sFreeSide then
            rednet.open( sFreeSide )
            sOpenedSide = sFreeSide
            return true
        else
            print( "No modem attached" )
            return
        end
    end
    return true
end

open()
print("Running lights program...")
while true do
        event, id, text = os.pullEvent()
        if event == "rednet_message" then
                if id == 0 then
                        if text == "Light-on" then
                                redstone.setOutput(bottom,true)
                        else
                                if text == "Light-off" then
                                        redstone.setOutput(bottom,false)
                                end
                        end
                end
        end
end