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%% 
%%  A DANTE-Edition example
%% 
%% 
%%  Copyright (C) 2010 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{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-text,pst-plot,multido}
     \def\spiral{ 1 9 Pi mul div t DegtoRad mul t cos mul
                 -1 9 Pi mul div t DegtoRad mul t sin mul }
     \def\gSP#1#2{\parametricplot[plotstyle=curve]{#1}{#2}{\spiral}}%
     \def\f{\gSP{180}{1620}}% pi / 2 to 9 pi / 2


\begin{document}
  \psset{xunit=0.75cm,yunit=0.75cm}
   \begin{pspicture}(-5,-5)(5,5)
     \psset{unit=1.6in,subgriddiv=20}%
     \multido{\iA=1440+-180,\iB=1620+-180,\iC=0+1}{6}{%
       \psclip{\pscustom[linestyle=none]{\gSP{\iA}{\iB}}}%
         \psframe*[linecolor=%
	  \ifcase\iC green\or green\or yellow\or yellow\or red\or red\fi](-1,-1)(1,1)
       \endpsclip
     } % end multido
%
     \psline(.88889,0)(-.7778,0)
     \psline(-.4815,-.834)(.42953,.73773)
     \psline(.46296,-.8019)(-.4074,.70565)
     {\Large%
      \pstextpath[c](-0.86,0.05){\gSP{1260}{1440}}{Planning}%
      \pstextpath[c](0,0.05){    \gSP{1260}{1440}}{Low Level}%
      \pstextpath[c](0.86,0.05){ \gSP{1260}{1440}}{Mid Level}%
%
      \pstextpath[c](-0.99,0.05){\gSP{1440}{1620}}{High Level}%
      \pstextpath[c](-0.05,0.05){\gSP{1440}{1620}}{Testing}%
      \pstextpath[c](0.99,0.05){ \gSP{1440}{1620}}{Documentation}%
%
      \pstextpath[l](0.1,-0.125){\gSP{540}{720}}{Cycle One $\longrightarrow$}%
      \pstextpath[l](0.1,-0.125){\gSP{900}{1080}}{Cycle Two $\longrightarrow$}%
      \pstextpath[l](0.1,-0.125){\gSP{1260}{1440}}{Cycle Three $\longrightarrow$}%
     }%
     \psclip{ \pscustom[linestyle=none]{\gSP{360}{540}} }%
       \psframe*[linecolor=white](-1,-1)(1,1)
     \endpsclip
%
     \psclip{ \pscustom[linestyle=none]{\gSP{180}{360}} }%
       \psframe*[linecolor=white](-1,-1)(1,1)
     \endpsclip
     \rput[l](-0.25,-0.13){Start}%
     \psline{->}(-0.225,-0.08)(-0.225,0)
     \multido{\iA=180+180,\iB=360+180}{8}{\gSP{\iA}{\iB}}
   \end{pspicture}%
\end{document}