%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 5-9-13 on page 259.
%% 
%%  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{multido,pstricks}
\StopShownPreambleCommands
\begin{document}
\newcommand\circularFill[1]{%
  \psset{unit=#1}
  \begin{pspicture}(-1,-1)(1,1)
    \multido{\nHue=0.01+0.01}{100}{%
      \definecolor{MyColor}{hsb}{\nHue,1,1}
      \pscircle[linewidth=0.01,
                linecolor=MyColor]{\nHue}}
  \end{pspicture}}
\begin{pspicture}(5,4)
 \begin{psclip}{\psframe(5,4)}
    \rput(2.5,2){\circularFill{3.5}}
 \end{psclip}
\end{pspicture}
\end{document}