function clear()
  term.clear()
  term.setCursorPos(1,1)
  sleep(1)
  print("Potato Inc. Mainframe v1.3\n")
end
function login()
  clear()

  print("\nPlease Login.")
  write("Username: ")
    x = read()
  write("Password: ")
    y = read("*")
  if x == "Jacob" and y == "test" then
    clear()
    print("Welcome " .. x)
    sleep(1)
    command()
  else
    sleep(1)
    print("Wrong Username or Password, Please try again")
    login()
  end
end

function command()
  rednet.open("back")

  clear()

  write(x .. ": ")
  z = read()

  if z == "open 1" then
    rednet.send(8, "open")
  elseif z == "close 1" then
    rednet.send(8, "close")
  else
    print("Unknown Command")
end

login()