diff --git a/birdie.py b/birdie.py
index a2d6bab..3f44be6 100644
--- a/birdie.py
+++ b/birdie.py
@@ -1 +1,20 @@
-print('Hello world !')
+import pgzrun
+
+TITLE = "Paf l'oiseau"
+WIDTH = 400
+HEIGHT = 708
+
+def on_mouse_down():
+    print('Clic souris !')
+    titi.x -= 50 # équivalent à titi.y = titi.y - 50
+
+def update():
+    titi.x += 1
+
+def draw():
+    screen.blit('background', (0, 0))
+    titi.draw()
+
+titi = Actor('bird1', (75, 350))
+
+pgzrun.go()
\ No newline at end of file