minecraft ComputerCraft pass door

--seting pass--
pass = ("1234")
---------------

while true do
print("Enter password.")
a = read()
if a == pass then
  print("Password correct!")
  rs.setOutput("right", true)
  sleep(3)
  rs.setOutput("right", false)
elseif a == "exit" then
  print("Good bay")
else
  print("Password incorrect!")

  rs.setOutput("top", true)
  print("Enter Masster Pass")
  b = read()
  if b == "4321" then
  print("password correct!")
  rs.setOutput("top", false)
else
  print("password incoorretc!")
end
end
end