Need help with door lock

os.pullEvent = os.pullEventRaw

local function lockOut(lockTime)
  for i=1,lockTime do
    filehandle = fs.open("locked","w")           -- Ready a file called "locked" to write to. Contents will be replaced.
    filehandle.write(tostring(lockTime - i + 1)) -- Writes the current lockout time to disk.
    filehandle.close()                           -- Indicates we're done with the file for now.

    term.clear()
    term.setCursorPos(1,1)
    print("Out of Attempts! Please wait "..(lockTime - i + 1).." minutes!")
    sleep(60)
  end

  fs.delete("locked")  -- Lockout complete, so we can delete the file.
end

local function open()  -- Local functions don't stay in RAM when the program ends,
.                      -- but they must be declared before they're called.
. 
.
end

local function failsafe1()
  -- Really this whole function should be merged with the open() function...

  for  lock = 3, 1, -1 do
    if open() then return end
  end

  lockOut(30)
end

local function debug()
.
.
.
end

local function main()
.
.
.
end

do  -- So the local "tempLockTime" variable won't stick around longer then it needs to.
  if fs.exists("locked") then                            -- If a file called "locked" exists, then...
    filehandle = fs.open("locked","r")                   -- ... ready it for reading from...
    local tempLockTime = tonumber(filehandle.readLine()) -- ... read a line from it, convert that to number...
    filehandle.close()                                   -- ... then close the file to indicate we're done with it for now.

    lockOut(tempLockTime)
  end
end

main()