passkey = "PASSWORD"
while true do
  if disk.isPresent("SIDE") then -- Put side to the side the disk drive is on
        h = fs.open("disk/passcode", "r")
        if h.readAll() == passkey then
          print("Accepted")
          -- Insert anything here for the code, rs.setOutput() whatever..
        else
          print("Denied")
          disk.eject("side") -- Replace side with diskdrive side
        end
  end
end