%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 28-02-7 auf Seite 609.
%% 
%%  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
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{145.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-eucl}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-1.5,-1.5)(1.5,1.5)
  \pstGeonode(1,1){A}(-1,-1){B}(-1,1){C}(1,-1){D}
  \pstLineAB{C}{D}
  \psset{linecolor=blue,linewidth=2pt}
  \pstLineAB[nodesep=-0.6,linecolor=lightgray]{A}{B}
  \pstLineAB{A}{B}% overwrite line
\end{pspicture}
\end{document}
