diff --git a/TD03/code/viz.py b/TD03/code/viz.py
index 8e37c6ce401870967f06885005fb7f995a459000..6443a22dafbba6569921ffc6c7c05f18dd2ac208 100644
--- a/TD03/code/viz.py
+++ b/TD03/code/viz.py
@@ -1,11 +1,14 @@
 from graphviz import Digraph
 
-g = Digraph('G', filename='graph.gv')
+name = 'arbre-viz-profondeur'
 
-g.edge('a', 'b')
-g.edge('a', 'c')
+g = Digraph('G', filename = name + '.gv', format='png') # par defaut format='pdf'
 
-print(g.source)
+g.edge('chien', 'petit')
+g.edge('chien', 'et')
+g.edge('petit', 'le')
+g.edge('et', 'jaune')
+g.edge('et', 'noir')
 
-g.render(filename='img')
+# génere et affiche le graphe name.gv.png
 g.view()
\ No newline at end of file