diff --git a/src/main.rs b/src/main.rs
index dcd81bf..f2d6d0a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -237,23 +237,36 @@ impl Game{
             let posx_2 = posx + bloc.charge.x;
             let posy_2 = posy + bloc.charge.y;
 
-            for _i in 1..1{
-                println!("coucou");
+            
+            let mut range = posx..posx_2;
+            if posx < posx_2{
+                range = posx..posx_2;
+            }else if posx > posx_2 && posx > 0{
+                range = posx_2..posx;
+            }else{
+                //there is not velocity in the x axis 
+                range = posx..posx+1;
             }
-
-            for tmp_x in posx..posx_2{
+            
+            for tmp_x in range{
                 let tmp_y;
-                tmp_y = posy + (tmp_x-posx)*((posy_2-posy) / (posx_2-posx));
-                //check the tile in the new Point
+                //tmp_y = posy + (tmp_x-posx)*((posy_2-posy) / (posx_2-posx));
+                if posx_2-posx == 0{
+                    tmp_y = posy + (tmp_x-posx)*1;
+                }else{
+                    tmp_y = posy + (tmp_x-posx)*((posy_2-posy) / (posx_2-posx));
+                }
+                //check the tile in the new Point   
                 let tmp_index_2d = Point::new(tmp_x / (WINDOW_WIDTH / map.size.x),tmp_y / (WINDOW_HEIGHT / map.size.y));
                 let tmp_index_1d = tmp_index_2d.x + map.size.x * tmp_index_2d.y;
 
                 match map.grid[tmp_index_1d as usize]{
                     Tile::Rock =>{
                         bloc.charge = Point::new(0, 0);
+                        println!("rock");
                     }
                     _=>{
-                        //nothing
+                        println!("Not rock");
                     }
                 }