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

%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 6-2-25 on page 345.
%%
%% 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{135.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-node}
\StopShownPreambleCommands
\begin{document}
\large\rnode{A}{\psframebox{start}}\qquad
\rnode{M}{\psframebox{middle}}\qquad
\rnode{B}{\psframebox{end}}
\ncline{->}{A}{M}\ncline{->}{M}{B}
\ncloop[loopsize=0.9,arm=0.4,linearc=.2,angleB=180]
{->}{A}{B}
\end{document}