2.5.4.5 NEW Command
  The NEW command clears the memory and assigns a name
  to a program to be entered. The following command as-
  signs the name PROG1 to the program. You can then enter
  program lines.
  NEW PROG1

  If you do not specify a name, BASIC issues the following
  prompt:
  New file name--

  You should respond with a name. If you press the return
  key in response to the prompt, BASIC assigns the name
  NONAME.