%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 2-3-13 on page 49.
%% 
%%  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{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.83385pt}

\StartShownPreambleCommands
\usepackage{xcolor,pict2e,curve2e}
\StopShownPreambleCommands
\begin{document}
\setlength\unitlength{1cm}
\begin{picture}(5,5)(0.,0.)
  \Curve(2.5,0.0)<0,1>(3.0,1.5)<1,1>%
  (5.0,2.5)<1,0>[-1,0](3.0,3.5)<-1,1>%
  (2.5,5.0)<0,1>[0,-1](2.,3.5)<-1,-1>%
  (0.0,2.5)<-1,0>[1,0](2.,1.5)<1,-1>%
  (2.5,0.0)<0,-1>
  \color{blue}
  \thinlines
  \put(0,0){\line(0,5){5}}\put(0,0){\line(5,0){5}}
  \put(5,0){\Line(0,5)}   \LINE(0,5)(5,5)
\end{picture}
\end{document}