\begin{figure}[H]
  \begin{center}
    \unitlength=4pt
    \begin{picture}(60, 35)(0,-17)
    \gasset{Nw=2,Nh=2,Nmr=1,curvedepth=0}
    \thinlines
    \node[Nmarks=i,iangle=180](A1)(0,0){}
    \node(A2)(15,15){}
    \node(A3)(30,15){}
    \node[Nmarks=f,fangle=0](A4)(45,15){}
    \node[Nmarks=f,fangle=0](A5)(60,0){}
    \node(A6)(15,-15){}
    \node[Nmarks=f,fangle=90](A7)(30,-15){}
    \node(A8)(45,-15){}
    \drawedge(A2,A3){$A$}
    \drawedge(A4,A5){$S$}
    \drawedge[ELside=r](A1,A6){$D$}
    \drawedge[ELside=r](A6,A7){$O$}
    \drawedge[ELside=r](A7,A8){$U$}
    \drawedge[ELside=r](A8,A5){$X$}
    \drawedge[curvedepth=4](A1,A2){$B$}
    \drawedge[curvedepth=3](A3,A4){$L$}
    \drawedge[ELside=r,curvedepth=-4](A1,A2){$P$}
    \drawedge[ELside=r,curvedepth=-3](A3,A4){$N$}
    \drawedge[curvedepth=-6](A7,A4){$N$}
    \end{picture}
  \end{center}
  \caption{Représentation par automate.}
\end{figure}