%% 
%%  Ein Beispiel der DANTE-Edition
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%%  7. Auflage
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%%  Beispiel 15-03-6 auf Seite 266.
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%%  Copyright (C) 2016 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
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-node}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}[showgrid](7,7)
\pnodes{a}(0.5,0)(2.5,1.8)(5.5,2.5)(6.25,3)(7,5)% a0,a1,a2,a3,a4
\pnodes(0,1){b0}(2,3){b1}(5,4){b2}(5.5,5){b3}(6,7){b4}
\pscurve[arrowscale=2,linewidth=1.2pt]{->}(a0)(a1)(a2)(a3)(a4)
\pscurve[arrowscale=2,linewidth=1.2pt]{->}(b0)(b1)(b2)(b3)(b4)
\psellipseAB(a0)(b0){0.1}
\psellipseAB[fillcolor=red!40,fillstyle=solid](a1)(b1){0.15}
\psellipseAB(a2)(b2){0.2}
\psellipseAB[fillcolor=blue!40,fillstyle=solid](a3)(b3){0.25}
\uput[135](b1){$dS_1$}\uput[135](b2){$dS_2$}
\end{pspicture}
\end{document}