diff --git a/display.c b/display.c
index 94371c5bdb44960d2373dbcc54b212abeb538bc9..7272bbddf766f68536dc59f970b74142f40f0f0b 100644
--- a/display.c
+++ b/display.c
@@ -10,9 +10,6 @@ SDL_Window* init_display(){
 	int one_arm_width, one_arm_height;
 	SDL_Window *window;
 
-	// -------------------------
-  	// Graphic initialization
-	// -------------------------
 	assert(SDL_Init(SDL_INIT_VIDEO) == 0);
 	get_image_file_size("./one_armed_bandit.png", &one_arm_width, &one_arm_height);
 	assert((window = SDL_CreateWindow("one_armed_bandit", SDL_WINDOWPOS_UNDEFINED,
@@ -33,16 +30,12 @@ SDL_Window* init_display(){
 }
 
 void display_wheel(int pixel,int offset){
-    // -------------------------
-	// example of board display:
-	// -------------------------
 	SDL_Rect src_rect, dst_rect=object_rect;
 	dst_rect.h=object_height*1.5;			// display 1.5 object on screen for a wheel
 	src_rect=dst_rect;
 	src_rect.x=0;
 
 	// src_rect.y is positionned here on the 2nd object of objects.png
-    //85 + index*104  + 1
 	src_rect.y= offset;
 	dst_rect.x= pixel;
 	dst_rect.y=410-object_height/2;     // setup the coord. of the icon in the global renderer
diff --git a/one_armed_bandit.c b/one_armed_bandit.c
index a66b782597663b628c29e4ab3e93baa0aa059fe5..ca4bf7364d6e429f7ef9b3588020fed6eaf0d779 100644
--- a/one_armed_bandit.c
+++ b/one_armed_bandit.c
@@ -27,6 +27,16 @@ int how_many_points(machine mas){
 	return count;
 }
 
+int stopped_wheels(machine mas){
+	int res = 0;
+	for(int i = 0; i<WHEEL_NB; i++){
+		if(mas.wheels[i].speed == 0){
+			res+=1;
+		}
+	}
+	return res;
+}
+
 
 int main()
 {
@@ -88,7 +98,7 @@ int main()
 							break;
 						case SDLK_s:
 							wait_key_release();
-							if(mas.player_wallet > 0){
+							if(mas.player_wallet > 0 && stopped_wheels(mas) > 0){
 								paid = false;
 								mas.player_wallet -= 1;
 								mas.machine_wallet += 1;
diff --git a/one_armed_bandit.h b/one_armed_bandit.h
index 13e36f0ec75c0c83ad83fa2d09798797c80e15fe..ca932cf73e8d025cd46e7c6e0783079f6c4bd5e9 100644
--- a/one_armed_bandit.h
+++ b/one_armed_bandit.h
@@ -19,5 +19,8 @@
         \#/
         
 */
-int how_many_points(machine mas);
+
 // returns the score based on the positionning of the wheels
+int how_many_points(machine mas);
+
+int stopped_wheels(machine mas);
\ No newline at end of file