%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 5-7-2 on page 241.
%% 
%%  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}
\StartShownPreambleCommands
\usepackage{multido,pstricks}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](3,3)
 \multido{\rA=0.1+0.25,\rB=0.05+0.05,
  \rC=3.0+-0.25,\nA=0+10}{10}{%
    {\psset{linecolor=black!\nA}\qdisk(\rA,\rA){\rB}}
     \pscircle[linecolor=white,fillcolor=black!\nA,
        fillstyle=solid](\rC,\rA){\rB}}
\end{pspicture}

\end{document}