%% 
%%  A DANTE-Edition example
%% 
%%  Example 11-01-2 on page 122.
%% 
%%  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}

\begin{document}
\newpsstyle{Fiber}{linewidth=2pt}
\begin{pspicture}(4,4)
  \psline[style=Fiber](0,0)(4,1)
  \addtopsstyle{Fiber}{linecolor=green}
  \psline[style=Fiber](0,1)(4,2)
  \addtopsstyle{Fiber}{linestyle=dotted}
  \psline[style=Fiber](0,2)(4,3)
  \addtopsstyle{Fibber}{linecolor=red}
  \psline[style=Fibber](0,3)(4,4)
\end{pspicture}
\end{document}