\documentclass{ppex}
\nonstopmode
\usepackage [all,poly]{xy}
\pagestyle{empty}
\setlength\textwidth{183.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage [all,poly]{xy}
\[\begin{xy}/r9mm/:
 (0,0),{\xypolygon6{%
  ~:{(1,-.1):(0,.33)::}~<{-}}}
,(0,2),{\xypolygon6{%
  ~:{(1,-.2):(0,.5)::}~<{-}}}
,(2.5,0),{\xypolygon6{%
  ~:{(1,.2):(0,-.3)::}~<{-}}}
,(2.5,2),{\xypolygon6{%
  ~:{(1,.3):(0,-.6)::}~<{-}}}
,(5,0)="O", +(-.5,3)="T","O"
,{\xypolygon6{~:{(1,0.2):(0,.4)::}
  ~<>{;"T"**@{-}}}}
\end{xy}\]
\end{document}

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