%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 21-01-5 auf Seite 344.
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%%  Copyright (C) 2016 Herbert 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
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks,pst-grad}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(5,3.5)
\psset{fillstyle=gradient,linestyle=none,
  gradmidpoint=0.5}
\psframe[gradangle=0](5,1)
\psframe[gradangle=45](0,1.25)(5,2.25)
\psframe[gradangle=90](0,2.5)(5,3.5)
\end{pspicture}
\end{document}