diff --git a/birdie.py b/birdie.py
index 3d98845..11db90e 100644
--- a/birdie.py
+++ b/birdie.py
@@ -10,12 +10,34 @@ def on_mouse_down():
 
 def update():
     titi.y += titi.speed
+    tube_superieur.x -= vitesse_defilement
+    tube_inferieur.x -= vitesse_defilement
+
+    if tube_superieur.x < 0 or tube_inferieur.x < 0 :
+        tube_superieur.x = WIDTH
+        tube_inferieur.x = WIDTH
 
 def draw():
     screen.blit('background', (0, 0))
     titi.draw()
+    tube_superieur.draw()
+    tube_inferieur.draw()
 
 titi = Actor('bird1', (75, 350))
+tube_superieur = Actor('top', (300,-50,))
+tube_inferieur = Actor('bottom', (300,700))
+
+
 titi.speed = 1
+vitesse_defilement = 1
+
+
+
+
+print(tube_superieur.width, tube_superieur.height)
+
+
+
+
 
 pgzrun.go()
diff --git a/paf-loiseau b/paf-loiseau
new file mode 160000
index 0000000..73a5928
--- /dev/null
+++ b/paf-loiseau
@@ -0,0 +1 @@
+Subproject commit 73a5928bb30eac022e4e75d97302aa4aa8953dbd