%% 
%%  A DANTE-Edition example
%% 
%%  Example 16-04-21 on page 249.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-node}

\begin{document}
\hspace*{0.5cm}\rnode{A}{\psframebox{%
   \large\textbf{beginning}}} of the
\rnode{B}{\psframebox{\large\textbf{end}}
\ncloop[angleA=180,loopsize=0.9,arm=0.5,
    linearc=.2]{->}{A}{B}}
\ncput[npos=1.5,nrot=:U]{%
   \psline{|<->|}(.45,-.2)(-.45,-.2)}
\nbput[npos=1.5,nrot=:D,labelsep=.35cm]%
   {\small\texttt{loopsize}}
\ncloop[angleA=10,angleB=180,%
   linecolor=cyan,linearc=.2]{->}{B}{A}
\end{document}