\documentclass{beamer}

\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
% \usepackage[usenames,dvipsnames]{pstricks}
% \usepackage{epsfig}
% \usepackage{pst-grad} % For gradients
% \usepackage{pst-plot} % For axes
% \usepackage{amsfonts}
% \usepackage{amssymb}
% \usepackage{float}
% \usepackage{listings}

\usetheme{Warsaw}

\author{Adrien Nader}
\title{MOO}

\AtBeginSubsection[]
{
  \begin{frame}<beamer>
    \frametitle{MOO}
    \tableofcontents[currentsection,currentsubsection,hideothersubsections]
  \end{frame}
}

\begin{document}

\begin{frame}
\titlepage
\end{frame}

\begin{frame}
\tableofcontents[hideallsubsections]
\end{frame}

\section{MOO}
  \subsection{MOO}
    \begin{frame}{MOO}
      \begin{itemize}
        \pause \item MOO
        \pause \item MOO
        \pause \item MOO
      \end{itemize}
    \end{frame}
  \subsection{MOO}
    \begin{frame}{MOO}
      \begin{itemize}
        \item<1-2> MOO
        \item<2-3> MOO
        \item<3-4> MOO
      \end{itemize}
    \end{frame}

\section{MOO}
  \subsection{MOO}
    \begin{frame}{MOO}
      \begin{itemize}[<+->]
        \item MOO
        \item MOO
        \item MOO
      \end{itemize}
    \end{frame}
  \subsection{MOO}
    \begin{frame}{MOO}
    MOO
    \end{frame}

\section{Conclusion}
  \begin{frame}
    \begin{itemize}[<+->]
      \item MOO
      \item MOO
      \item MOO
    \end{itemize}
  \end{frame}

\section*{Thanks}
  \begin{frame}
    MOO
  \end{frame}

\end{document}