%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 5-14-3 on page 298.
%% 
%%  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}
\SpecialCoor
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid=true](3,4)
 \psset{dotscale=1.25}
 \multips(0,0){50}{%
  \psdot(! rand 301 mod 100 div
   rand 301 mod 100 div rand 101
   mod 100 div 0.6 0.1 0.1 setcmykcolor)
  \psdot[dotstyle=o](! rand 301 mod 100 div
   rand 401 mod 100 div rand 101
   mod 100 div 0.6 0.1 0.1 setcmykcolor)}
\end{pspicture}
\end{document}