diff --git a/sdl-glisseur_dots_42.c b/sdl-glisseur_dots_42.c
new file mode 100644
index 0000000..501d2f5
--- /dev/null
+++ b/sdl-glisseur_dots_42.c
@@ -0,0 +1,164 @@
+#include <stdio.h>
+#include <unistd.h>
+#include "SDL.h"
+#include "SDL_image.h"
+
+#define DEBUG 0
+#define SDL_VIDEO_FLAGS (SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_ANYFORMAT | SDL_RESIZABLE)
+
+
+#define LARGEUR 70
+#define HAUTEUR 70
+
+
+
+static void process_events( void ){
+
+//#define LARGEUR 26
+//#define HAUTEUR 16
+
+//#define LARGEUR 166
+//#define HAUTEUR 100
+
+
+    /* Our SDL event placeholder. */
+    SDL_Event event;
+
+    /* Grab all the events off the queue. */
+    while( SDL_PollEvent( &event ) ) {
+        switch( event.type ) {
+        case SDL_KEYDOWN:
+            /* Handle key presses. */
+	  if((&event.key.keysym) ->sym == SDLK_ESCAPE){
+	    SDL_Quit();
+	  exit(0);
+	  }
+            break;
+
+        case SDL_QUIT:
+            /* Handle quit requests (like Ctrl-c). */
+	  SDL_Quit();
+	  exit(0);
+            break;
+
+        default:
+            break;
+        }
+    }
+}
+
+
+
+
+
+int main(int argc, char * argv[]){
+  SDL_Surface * screen;
+  SDL_Surface * dots[16];
+  char filename[16];
+  unsigned char wall[LARGEUR][HAUTEUR];
+  int i, j;
+  unsigned char n, nn, direction;
+  
+  for(i=0;i<16;i++){
+    sprintf(filename,"dots/%X.png",i);
+    dots[i]= IMG_Load(filename);
+    if(!dots[i]){
+      printf ( "IMG_Load: %s\n", IMG_GetError () );
+      return 1;
+    }
+  }
+  for(i=0;i<LARGEUR;i++){
+    for(j=0;j<HAUTEUR;j++){
+      wall[i][j]= 0;
+    }
+  }
+  if (SDL_Init(SDL_INIT_VIDEO) == -1){
+    printf("Erreur lors de l'initialisation de SDL: %s\n", SDL_GetError());
+    return 1;
+  }
+ 
+  screen = SDL_SetVideoMode(LARGEUR*10, HAUTEUR*10, 24, SDL_VIDEO_FLAGS);
+  printf("Mode video: %dx%dx%d\n", screen->w, screen->h, 
+	 screen->format->BitsPerPixel);
+  SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0,0,0)) ;
+  
+//  i=13;
+//  j=7;
+  i=LARGEUR / 2;
+  j=(HAUTEUR / 2) -1;
+
+  direction=1;
+  while (1) {
+    if(DEBUG) 	  printf("pos %d / %d col : %d !!! \n",i,j,wall[i][j]);
+    //wall[i][j]= (wall[i][j]+1)%16;
+    n=wall[i][j];
+    switch(n){
+      case 0:
+	nn=7;
+	direction=direction+3;
+	break;
+      case 7:
+	nn=11;
+	direction=direction+1;
+	break;
+      case 11:
+	nn=15;
+	direction=direction+1;
+	break;
+      case 15:
+	nn=0;
+	direction=direction+3;
+	break;
+    }
+    wall[i][j]=nn;
+    direction = direction % 4;
+    SDL_Rect dest={10*i,10*j,0,0};
+    //SDL_BlitSurface(dots[n],NULL,screen,&dest);
+    SDL_BlitSurface(dots[nn],NULL,screen,&dest);
+    //direction = (direction+1 +  2*(((nn/4 )%2))) % 4;
+    
+    SDL_UpdateRect(screen,10*i,10*j,10,10);
+    if(DEBUG) printf("direction=%i\n",direction);
+	switch(direction){
+	      case 0:
+		j=j-1;
+		if (j<0) {
+		  //j=15;
+		  j=HAUTEUR -1	;
+		  //direction=direction+2;
+		}
+		break;
+	      case 1:
+		i=i+1;
+		//if (i>25) {
+		if (i> (LARGEUR - 1)) {
+		 i=0;
+		 //direction=direction+2;
+		}
+		break;
+	      case 2:
+		j=j+1;
+		//if (j>15) {
+		if (j>(HAUTEUR -1)) {
+		 j=0;
+		 //direction=direction+2;
+		}
+		break;
+	      case 3:
+		i=i-1;
+		if (i<0) {
+		 //i=25;
+		 i=LARGEUR - 1;
+		 //direction=direction+2;
+		}
+		break;
+	    }
+	    direction = direction % 4;
+    SDL_Flip(screen);
+    process_events();
+    usleep(2);
+  }
+  SDL_Quit();
+  return 0;
+}
+