%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 5-13-30 on page 293.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](3,3)
  \pscustom{%
     \code{newpath}
     \coor(0,-2)(2,0)(0,2)(0.5,0.5)
     \code{
         moveto  % 0.5 0.5
         rlineto % +0x +2y
         rlineto % +2x +0y
         rlineto % +0x -2y
         closepath % back to 0.5 0.5
         2 setlinejoin
         7.5 setlinewidth
         0.1 0.5 0.6 0.2 setcmykcolor
         stroke}%
     }
\end{pspicture}
\end{document}