diff --git a/robot.py b/robot.py
index 1ded832..d7e885d 100644
--- a/robot.py
+++ b/robot.py
@@ -24,7 +24,7 @@ class Robot:
     # pins reliés au moteurs (bw_l, fw_l, bw_r, fw_r)
     motors_pins = ((9,10),(12,11))
     # position du spot lumineux
-    light_pos = (5, 1.5)
+    light_pos = (9, 1.5)
     # ecart entre les deux photores
     photores_l = 0.1
     # longeur du séparateur entre les photorésistances
@@ -66,8 +66,8 @@ class Robot:
                 self.pr_l = self.PHOTORES_SHADOW
                 self.pr_r = self.PHOTORES_LIGHT
         
-        self.pins[self.pr_l_pin] = 1024 * self.PHOTORES_BRIDGE/(self.pr_l+self.PHOTORES_BRIDGE)
-        self.pins[self.pr_r_pin] = 1024 * self.PHOTORES_BRIDGE/(self.pr_r+self.PHOTORES_BRIDGE)
+        self.pins[self.pr_l_pin] = int(1024-1024 * self.PHOTORES_BRIDGE/(self.pr_l+self.PHOTORES_BRIDGE))
+        self.pins[self.pr_r_pin] = int(1024-1024 * self.PHOTORES_BRIDGE/(self.pr_r+self.PHOTORES_BRIDGE))
         
             
     def analogWrite(self, pin, dc):
diff --git a/simulateur.py b/simulateur.py
index 5193037..3569bf5 100644
--- a/simulateur.py
+++ b/simulateur.py
@@ -54,9 +54,14 @@ while True:
     screen.fill(black)
     robotShape = pygame.Rect(20,15, 10,20);
     rsurf = pygame.Surface((50,50)).convert_alpha();
+    # robot
     pygame.draw.rect(rsurf, (255,255,255), robotShape);
+    # heading
     pygame.draw.line(rsurf, (255,255,255), (25,25), (25,50))
+    # dir2light
     pygame.draw.line(rsurf, (255,255,255), (25,25), (25+25*sin(r.angle2spot),25+25*cos(r.angle2spot)))
+    # light
+    pygame.draw.polygon(screen, (255,255,0), ([100*a for a in r.light_pos],[100*(a+b) for a,b in zip(r.light_pos,(-1,1))],[100*(a+b) for a,b in zip(r.light_pos,(-1,-1))]))
     rsurf_r = pygame.transform.rotate(rsurf, degrees(r.rot));
     center = rsurf_r.get_rect().center
     screen.blit(rsurf_r, (r.pos[0]*100-center[0],r.pos[1]*100-center[1]))