%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 04-01-22 auf Seite 55.
%% 
%%  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
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{169.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pstricks}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid](3,3)
  \psline*[linecolor=red,linearc=0.4]%
      (1,2)(2.5,2)(2.5,3)(1,3)(1,2)
  \psline[linearc=0.3,doubleline=true]%
      {->}(0,0)(1,2)(2,1.5)(1.5,0.5)(3,0.5)
\end{pspicture}
\end{document}