Background running code v2

local fileToMonitor = "yourfile.txt" -- Change this to your file name
local interval = 5 -- Interval in seconds

local function monitorFile()
  while true do
    if fs.exists(fileToMonitor) then
      -- Your code to send a message or perform actions when the file is found
      -- For example: redstone.setOutput("back", true)
    else
      -- Your code to run when the file is not found
      -- For example: shell.run("program_to_execute")
    end

    os.startTimer(interval)
    os.pullEvent("timer")
  end
end

local monitorThread = coroutine.create(monitorFile)
coroutine.resume(monitorThread)