%% 
%%  Ein DANTE-Edition Beispiel
%% 
%%  Beispiel 04-11-2 auf Seite 99.
%% 
%%  Copyright (C) 2010 Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

% Show page(s) 1,2

\PassOptionsToClass{}{beamer}
\documentclass{beamer}
\usepackage[utf8]{inputenc}


\useoutertheme{sidebar}\usecolortheme{dove}


\begin{document}
\begin{frame}{Ein Beispiel für die Umgebung \texttt{block}}%
  {Vorgabe und modifiziertes Layout.}
\begin{block}<1->{Der Satz von Pythagoras}
   $c^2=a^2 + b^2$
\end{block}
\setbeamertemplate{blocks}[rounded][shadow=true]
\setbeamercolor{block body}{bg=normal text.bg!90!black}
\setbeamercolor{block title}{bg=normal text.bg!90!red}
\setbeamerfont{block title}{size=\footnotesize,parent={structure,block body}}
\begin{block}<2->{Der Satz von Pythagoras}
   $c^2=a^2 + b^2$
\end{block}
\end{frame}
\end{document}