detecte = false
needsleep = false
reader = peripheral.wrap("top")

while true do
  reader.scan(5)
  detecte = false
  while true do
    event, message = os.pullEvent()
    if event == "rfid_detected" then
      if message == "ftbpoudi7mc" then
        detecte = true
        rs.setOutput("left",true)
        needsleep = true
      end
    elseif event == "rfid_scan_done" then
      if detecte == false then
        if needsleep == true then
          sleep(2)
          needsleep = false
        end
        rs.setOutput("left",false)
      end
      break
    end
  end
end