% Compilation
% latex -interaction=nonstopmode %.tex
% dvips -Pdownload35 -o %.ps %.dvi
% ps2pdf %.ps
%--------------------------------------

\documentclass[a4paper,12pt,twoside]{article}
\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[french]{babel}
\usepackage{amsmath,amssymb}

% package pstricks
\usepackage{pst-eucl,pstricks-add,pst-fun,pst-tree}

\begin{document}

% PSTRICKS


\begin{psmatrix}[fillstyle=solid, fillcolor=yellow, mnode=circle]
\red{A}  & \red{B} & \red{C} & \red{D}\\
         & \red{G} & \red{F}  & \red{E} \\
\end{psmatrix}

\psset{linecolor=red, arrows=->}
\blue
% Noeuds A 
%\nccircle{1,1}{0.5cm}\taput{0.50}
%\ncarc{2,1}{1,1}\tlput{0.25}
\ncarc{1,1}{1,2}\taput{1}

% Noeud B
\nccircle{1,2}{0.5cm}\taput{1/6}
\ncarc{1,2}{1,3}\taput{5/6}
%\ncarc{2,2}{2,1}\tbput{0.25}

% Noeud C
\nccircle{1,3}{0.5cm}\taput{1/3}
\ncarc{1,3}{1,4}\taput{2/3}

% Noeud D
%\nccircle[angleA=180]{2,3}{0.5cm}\tbput{0.60}
\nccircle{1,4}{0.5cm}\taput{1/2}
\ncarc{1,4}{2,4}\trput{1/2}

% Noeud E
\nccircle[angleA=180]{2,4}{0.5cm}\tbput{2/3}
\ncarc{2,4}{2,3}\tbput{1/3}

% Noeud F
\nccircle[angleA=180]{2,3}{0.5cm}\tbput{5/6}
\ncarc{2,3}{2,2}\tbput{1/6}

% Noeud G
\nccircle[angleA=180]{2,2}{0.5cm}\tbput{1}
%\ncarc{2,3}{2,2}\tbput{1/6}

% ligne droite
%\ncline{2,1}{1,1}\tlput{0.25}

%----
%----
\end{document}