How can I automate this item overlay (in beamer)?

Question

For a presentation, I would like to reveal several items in a list in succession. Right now, the code is as follows; the corresponding (and desired) output is shown at the bottom of my post.

\documentclass{beamer}

\begin{document}

\frame{
\begin{itemize}
  \item stay
    \begin{itemize}
      \item<2-> one
      \item<3-> two
      \item<4-> three
    \end{itemize}
  \item stay 2
    \begin{itemize}
      \item<5-> and four
        % \item<> Ooops, forgot something
      \item<6-> and five
    \end{itemize}
\end{itemize}
}

\end{document}

How can I automate (counters?) the revealing of the items such that there be no need to increase the numbers in <...> by hand. If I need to include one more \item somewhere at the beginning, increasing every subsequent <...> is tedious. I'm thinking about something like a new '\itemnext item I forgot'...

Answer 1

Get rid of all your \item overlay specifications and simply pass <+(1)-> as optional argument to the two inner itemize environments: \begin{itemise}[<+(1)->]. The 1 acts as an offset here; it delays the appearance of the first item by one slide. See subsubsection 9.6.4 in the beamer manual for more details.

\documentclass{beamer}

\begin{document}

\frame{
\begin{itemize}
  \item stay
    \begin{itemize}[<+(1)->]
      \item one
      \item two
      \item three
    \end{itemize}
  \item stay 2
    \begin{itemize}[<+(1)->]
      \item and four
        % \item<> Ooops, forgot something
      \item and five
    \end{itemize}
\end{itemize}
}

\end{document}