command

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()
  clear()
  write(x .. ": ")
  z = read()
  a = string.gmatch(z, %s)

  if a[0] == "open" then
    print ("open")
  elseif a[0] == "close" then
    print("close")
  else
    print("Unknown Command"
end

login()