%% 
%%  A DANTE-Edition example
%% 
%%  Example 04-01-15 on page 50.
%% 
%%  Copyright (C) 2011 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[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}

\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}