%% 
%%  A DANTE-Edition example
%% 
%%  Example 36-00-28 on page 780.
%% 
%%  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{375.57637pt}
\setlength\parindent{0pt}

\usepackage[dvipsnames]{pstricks}
\usepackage{pst-node,multido}

\begin{document}
\sffamily
\psset{unit=1.25, dimen=middle}
\SpecialCoor
\begin{pspicture}(-5,0)(5,5)
  \pnode(-5,0){A}\pnode(5,0){B}\pnode(0,5){C}\pnode(0,0){MC}
  \psclip{\pspolygon(A)(B)(C)}
    \multido{\nA=1+1}{179}{%
       \psline[linewidth=.25\pslinewidth,linecolor=Orange](3;\nA)(5;\nA)
    }
  \endpsclip
  \pspolygon*[linecolor=white](-4.7,0)(0,4.7)(4.7,0)
  \psclip{\pspolygon(A)(B)(C)}
    \multido{\nA=5+10,\nB=10+10}{18}{%
       \psline[linewidth=.5\pslinewidth,linecolor=Orange](3;\nA)(5;\nA)
       \psline[linecolor=Orange](0.5;\nA)(5;\nA)
       \rput*(3;\nA){\nA}
    }
  \endpsclip
\end{pspicture}
\end{document}