%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-7-56 on page 459.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  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.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pst-func,multido}
\definecolorseries{col}{cmyk}%
    {last}{blue}{white}
\resetcolorseries[41]{col}
\StopShownPreambleCommands
\begin{document}
\psset{unit=.4}
\begin{pspicture}(-9,-8)(9,8.5)
  \psaxes[Dx=2,Dy=2,tickstyle=bottom,
    ticksize=2pt]{->}(0,0)(-9,-8)(9,8.4)
  \multido{\rA=0.2+0.1,\iA=0+1}{40}{%
    \psLame[radiusA=8,radiusB=7,
      linecolor={col!![\iA]},
      linewidth=.8pt]{\rA}}
\end{pspicture}

\end{document}