computercraft txt_to_monitor

local function displayFile(file_name, hold_time, monitor_name)
  -- count number of lines in the file
  local lines = 0
  for line in io.lines(file_name) do
    lines = lines + 1
  end

  parallel.waitForAny(
    function()
      -- run the editor
      shell.run(string.format("monitor %s edit %s", monitor_name, file_name))
    end,
    function()
      -- simulate a down key press every hold_time seconds
      for i = 1, lines do
        sleep(hold_time)
        os.queueEvent("key", keys.down)
      end
    end
  )
end