%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 2-3-15 on page 50.
%% 
%%  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{111.83385pt}

\StartShownPreambleCommands
\usepackage{xcolor,pict2e,curve2e}
\StopShownPreambleCommands
\begin{document}
\setlength\unitlength{1cm}
\begin{picture}(2.5,5)(-2.5,-2.5)
  \DividE 360pt by 12pt to\Twelfth
  \DirFromAngle\Twelfth to\Dir
  \CopyVect -2.5,0 to\Vzero
  \MultVect\Vzero by\Dir to\Vone
  \MultVect\Vone by\Dir to\Vtwo
  \Arc(0.0,0.0)(\Vzero){30}
  \Arc(0.0,0.0)(\Vone){30}
  \VectorArc(0.0,0.0)(\Vtwo){-30}
  \color{blue}\MultVect\Vzero by*\Dir to\Vmone
              \MultVect\Vmone by*\Dir to\Vmtwo
              \Arc(0.0,0.0)(\Vzero){-30}
              \Arc(0.0,0.0)(\Vmone){-30}
              \VectorARC(0.0,0.0)(\Vmtwo){30}
  \color{green}\thinlines
              \VECTOR(0,0)(\Vzero)
              \VECTOR(0,0)(\Vone)\VECTOR(0,0)(\Vmone)
              \VECTOR(0,0)(\Vtwo)\VECTOR(0,0)(\Vmtwo)
\end{picture}
\end{document}