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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 5-7-14 on page 246.
%%
%% 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{159.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](3,3)
\psccurve*[linecolor=cyan]%
(1.5,1.5)(2.5,1.5)(2.5,2.5)(1.5,2.5)
\psccurve[showpoints=true]%
(1.5,1.5)(2.5,1.5)(2.5,2.5)(1.5,2.5)
\psccurve[showpoints=true,linecolor=red,
linewidth=1.5pt](.5,0)(2.5,1)(2.5,0)(.5,1)
\end{pspicture}
\end{document}
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