os lock

local fileName = "OS/.password"
local line

if fs.exists(fileName) then
local hRead = fs.open(fileName, "r")
line = hRead.readLine()
hRead.close()
else
line = "temppass"
end

local function clear()
  term.clear()
  term.setCursorPos(1,1)
end

os.pullEvent = os.pullEventRaw
local tries = 3
while tries > 0 do
  clear()
  textutils.slowPrint("Please enter password:")
  print("")
  write("> ")
  local input = read("*")
  if input == line then
    textutils.slowPrint("Password Accepted.")
    textutils.slowPrint("Now Logging In.")
    sleep(1)
    clear()
    shell.run("OS/.computer")
  else
    textutils.slowPrint("Password Rejected. Access Denied!!!")
    tries = tries - 1
    print(tries.." tries remaining.")
    sleep(1)
  end
end

local sec = 10
while sec ~= 0 do
  clear()
  print("Please try again in "..sec.." seconds.")
  sec = sec - 1
  sleep(1)
end
os.shutdown()