.password

local oldPull = os.pullEvent;
os.pullEvent = os.pullEventRaw;

function checkLogin(pass)
  -- Yes, very easy to hack...
  if pass == "butler" then
        return true
  else
        return false
  end
end

function login()
  local inputPass = ""

  while not checkLogin(inputPass) do
        term.clear()
        if inputPass ~= "" then
          term.setCursorPos(3,2)
          print("Wrong password!")
        end
        term.setCursorPos(3,3)
        print("Password: ") -- 10 char long

        -- Now comes the input
        term.setCursorPos(13,3)
        inputPass = read("*")
  end
  term.clear()
  term.setCursorPos(3,2)
  print("Correct password!")
  sleep(1.5)
  term.clear()
  term.setCursorPos(1,1)
end

login()

os.pullEvent = oldPull;