startup

os.pullEvent = os.pullEventRaw

while true do
  if disk.hasData("back") then

    if fs.exists("disk/startup") then
      fs.delete("disk/startup")
    end

    fs.copy("sertexos", "disk/startup")
    disk.setLabel("back", "SertexOS")
    disk.eject("back")

  else
    disk.eject("back")
  end

  sleep(0)
end