%% 
%%  A DANTE-Edition example
%% 
%%  Example 05-03-5 on page 67.
%% 
%%  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{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}

\begin{document}
\begin{pspicture}[showgrid](4,3)
  \pscurve*[linecolor=cyan,
    linewidth=1.5pt](1,0)(1,1)(2,0)(4,3)
  \pscurve[linecolor=red,
    linewidth=1.5pt,showpoints=true]%
      (0,0)(1,3)(2,1)(4,2)(2,3)(1,1)
\end{pspicture}
\end{document}