diff --git a/glisseur_10.c b/glisseur_10.c
index 082ae62..51a0425 100644
--- a/glisseur_10.c
+++ b/glisseur_10.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include "SDL.h"
-
+#include <math.h>
 
 /*
             DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
@@ -33,7 +33,8 @@
 /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// ///
 
 
-
+#define WIDTH 640
+#define HEIGHT 480
 
 
 Uint32 getpixel(SDL_Surface *surface,int x,int y)
@@ -111,7 +112,8 @@ int main(int argc, char * argv[])
     }
 #define SDL_VIDEO_FLAGS (SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_ANYFORMAT)
 
-    screen = SDL_SetVideoMode(640, 480, 24, SDL_VIDEO_FLAGS);
+    //screen = SDL_SetVideoMode(640, 480, 24, SDL_VIDEO_FLAGS);
+    screen = SDL_SetVideoMode(WIDTH, HEIGHT, 24, SDL_VIDEO_FLAGS);
 //    screen = SDL_SetVideoMode(270, 16, 24, SDL_VIDEO_FLAGS);
 
     printf("Mode video: %dx%dx%d\n", screen->w, screen->h, 
@@ -119,8 +121,10 @@ int main(int argc, char * argv[])
     //SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0xff, 0xff, 0xff));
     SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 254, 254, 254));
 
-    i=320;
-    j=240;
+    //i=320;
+    //j=240;
+    i = floor(WIDTH / 2);
+    j = floor(HEIGHT / 2);
     direction=1;
     //for (j = 0; j < screen->h; j++) {
       //for (i = 0; i < screen->w; i++) {
@@ -280,29 +284,72 @@ while (0!=1) {
 	}
 	putPixel(screen, i, j, SDL_MapRGB(screen->format, nr, ng, nb));
 	//putPixel(screen, i, j, SDL_MapRGB(screen->format, 0xfe, 0, 0));
-	
+
+	// BORDER BOUNCE //
 	switch(direction){
 	      case 0:
 		j=j-1;
 		if (j<0)
-		  j=479;
+		  //j=479;
+		  j = 0;
 		break;
 	      case 1:
 		i=i+1;
-		if (i>639)
+		//if (i>639)
+		if ( i > ( WIDTH - 1 ) )
+		  //i=0;
+		  i = WIDTH -1;
+		break;
+	      case 2:
+		j=j+1;
+		//if (j>479)
+		if ( j > ( HEIGHT - 1 ) )
+		  //j=0;
+		  j = HEIGHT -1;
+		break;
+	      case 3:
+		i=i-1;
+		if (i<0)
+		  //i=639;
+		  //i = WIDTH - 1;
+		  i = 0;
+		break;
+	      direction = ( direction + 2 ) % 4;
+	    }
+	// END - BORDER BOUNCE //
+
+	
+	// BORDER PASS THROUGH //
+	/*
+	switch(direction){
+	      case 0:
+		j=j-1;
+		if (j<0)
+		  //j=479;
+		  j = HEIGHT - 1;
+		break;
+	      case 1:
+		i=i+1;
+		//if (i>639)
+		if ( i > ( WIDTH - 1 ) )
 		 i=0;
 		break;
 	      case 2:
 		j=j+1;
-		if (j>479)
+		//if (j>479)
+		if ( j > ( HEIGHT - 1 ) )
 		 j=0;
 		break;
 	      case 3:
 		i=i-1;
 		if (i<0)
-		 i=639;
+		  //i=639;
+		  i = WIDTH - 1;
 		break;
-	    }	
+	    }
+	*/
+	// END - BORDER PASS THROUGH //
+	
 	//SDL_UnlockSurface(screen);
 	SDL_Flip(screen);
       }