%% 
%%  A DANTE-Edition example
%% 
%%  Example 22-02-17 on page 327.
%% 
%%  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{pst-slpe}

\begin{document}
\begin{pspicture}(-0.5,-0.5)(5,0.5)
\psBall{black}{2ex}
\psBall(1,0){blue}{3ex}
\psBall(2.5,0){red}{4ex}
\psBall(4,0){green!50!blue!60}{5ex}
\end{pspicture}
\end{document}