%% 
%%  A DANTE-Edition example
%% 
%%  Example 12-01-3 on page 141.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}
\SpecialCoor

\begin{document}
\begin{pspicture}[showgrid](3,3)
  \psset{dotscale=1.25}
  \multips(0,0){80}{%
     \psdot(! rand 301 mod 100 div
       rand 301 mod 100 div rand 101
       mod 100 div 1 1 sethsbcolor)}
\end{pspicture}
\end{document}