%% The LaTeX Graphics Companion, 2ed (first printing May 2007)

%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 11-2-20 on page 735.
%%
%% 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{159.83385pt}

\StartShownPreambleCommands
\usepackage{xcolor,multido}
\definecolorseries{testA}
{rgb}{last}{black}{white}
\resetcolorseries[200]{testA}% series of 200 col
\linethickness{0.005\linewidth}
\StopShownPreambleCommands
\begin{document}
\noindent
\multido{\nC=1+1}{200}{\color{testA!![\nC]}%
\line(0,1){50}\hspace{0.005\linewidth}}
\end{document}