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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 5-8-4 on page 251.
%%
%% 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{135.83385pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{multido,pstricks}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](3,3)
\multido{\rA=0.25+0.25}{11}{%
\psdot[dotscale=\rA,dotstyle=triangle](\rA,\rA)}
\multido{\rA=0.25+0.25,\rB=2.75+-0.25,\nB=0+9}{11}{%
\psdot*[dotscale=\rA\space 4,dotstyle=triangle,
linecolor=black!\nB](\rA,\rB)}
\end{pspicture}
\end{document}
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