%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 11-2-22 on page 736.
%% 
%%  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{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}

\StartShownPreambleCommands
\usepackage{xcolor,multido}
\definecolorseries{testC}{rgb}{step}
     [rgb]{0.85,0.15,0.55}{0.37,0.47,0.17}
\resetcolorseries[100]{testC}
\linethickness{0.01\linewidth}
\StopShownPreambleCommands
\begin{document}
\noindent
\multido{\nC=1+1}{100}{\color{testC!!+}%
  \line(0,1){50}\hspace{0.01\linewidth}}
\\[2pt]
\linethickness{0.02\linewidth}
\multido{\nC=1+1}{50}{\color{testC!!++}%
  \line(0,1){50}\hspace{0.02\linewidth}}
\end{document}