diff --git a/src/graphics/buffers.c b/src/graphics/buffers.c
index 01d585b..0fc10a0 100644
--- a/src/graphics/buffers.c
+++ b/src/graphics/buffers.c
@@ -406,16 +406,10 @@ bool compute_space(int cube_side,
     int s = step_z * cube_side + step_y * cube_side + step_x * cube_side + 1;
     int side_size = cube_side;  /* IT IS A CUBE !   space_x = space_y = space_z    */
     draw_a_central_star_in_a_cubic_space (lines_origin, s, side_size);
-    draw_EW_ZA_SN_in_a_cubic_space (lines_origin, s, side_size);
+//    draw_EW_ZA_SN_in_a_cubic_space (lines_origin, s, side_size);
 
     if (0) for (int i = 0; i < side_size * side_size * side_size; i ++)
         draw_a_central_star (lines_origin, s + i * 6);
-//    draw_a_central_star (lines_origin, s +  4 * 6); // W
-//    draw_a_central_star (lines_origin, s + 10 * 6); // A
-//    draw_a_central_star (lines_origin, s + 12 * 6); // S
-//    draw_a_central_star (lines_origin, s + 14 * 6); // N
-//    draw_a_central_star (lines_origin, s + 16 * 6); // Z
-//    draw_a_central_star (lines_origin, s + 22 * 6); // E
 //
 //    draw_a_central_star (lines_origin, s +  12 * 6); // W
 //    draw_a_central_star (lines_origin, s + 112 * 6); // E
@@ -434,28 +428,74 @@ bool compute_space(int cube_side,
     printf("side = %d   step_x = %d   step_y = %d   step_z = %d\n",\
            cube_side, (cube_side + 1) * (cube_side + 1), cube_side + 1, 1);
 
-    /*           3               5                7                 11        */
-    /*------------------------------------------------------------------------*/
-    /* C        13              62              171                           */
-    /* step_x   16              36               49                           */
-    /* step_y    4               6                8                           */
-    /* step_y    4               6                8                           */
-    /* |side/2|  1   (f)         2                3                  4        */
-    /*------------------------------------------------------------------------*/
-    /* W         4 (- 9)        12 (- 50)        24 (- 147)                   */
-    /* E        22 (+ 9)       112 (+ 50)       318 (+ 147)                   */
-    /* A        10 (- 3)        52 (- 10)       150 (-  21)                   */
-    /* Z        16 (+ 3)        72 (+ 10)       192 (+  21)                   */
-    /* S        12 (- 1)        60 (-  2)       168 (-   3)                   */
-    /* N        14 (+ 1)        64 (+  2)       174 (+   3)                   */
-    /*------------------------------------------------------------------------*/
-    /* N-S   C +/- f                                                          */
-    /* Z-A   C +/- side x f                                                   */
-    /* E-W   C +/- side x side x f                                            */
+/* ------------------------------------------------------------------------*/
+/*            3               5                7                 11        */
+/* ------------------------------------------------------------------------*/
+/*  C        13              62              171                           */
+/*  step_x   16              36               49                           */
+/*  step_y    4               6                8                           */
+/*  step_y    4               6                8                           */
+/*  |side/2|  1   (f)         2                3                  4        */
+/* ------------------------------------------------------------------------*/
+/*  N-S   C +/- f                                                          */
+/*  Z-A   C +/- side x f                                                   */
+/*  E-W   C +/- side x side x f                                            */
+/* -----  if side  = 3  ---------------------------------------------------*/
+/*  W         4 (- 9)        12 (- 50)        24 (- 147)                   */
+/*  E        22 (+ 9)       112 (+ 50)       318 (+ 147)                   */
+/*  A        10 (- 3)        52 (- 10)       150 (-  21)                   */
+/*  Z        16 (+ 3)        72 (+ 10)       192 (+  21)                   */
+/*  S        12 (- 1)        60 (-  2)       168 (-   3)                   */
+/*  N        14 (+ 1)        64 (+  2)       174 (+   3)                   */
+/*                                                                         */
+//    draw_a_central_star (lines_origin, s +  14 * 6);
+
+/*  EZ       25   22+3                                                     */
+/*  EA       19   22-3                                                     */
+/*  ES       21   22-1                                                     */
+/*  EN       23   22+1                                                     */
+
+/*  WZ        7    4+3                                                     */
+/*  WA        1    4-3                                                     */
+/*  WS        3    4-1                                                     */
+/*  WN        5    4+1                                                     */
+
+/*  ZE       25   16+9                                                     */
+/*  ZW        7   16-9                                                     */
+/*  ZS       15   16-1                                                     */
+/*  ZN       17   16+1                                                     */
+
+/*  AE       19   10+9                                                     */
+/*  AW        1   10-9                                                     */
+/*  AS        9   10-1                                                     */
+/*  AN       11   10+1                                                     */
+/*                                                                         */
+/*  SE       21   12+9                                                     */
+/*  SW        3   12-9                                                     */
+/*  SZ       15   12+3                                                     */
+/*  SA        9   12-3                                                     */
+/*                                                                         */
+/*  NE       23   14+9                                                     */
+/*  NW        5   14-9                                                     */
+/*  NZ       17   14+3                                                     */
+/*  NA       11   14-3                                                     */
+/*                                                                         */
+/*                                                                         */
+/* -----------------------  if side = 5  ----------------------------------*/
+/*  WN                       12 (- 50)        24 (- 147)                   */
+
+
+
+
+
+
+
+
+
 
     /* ZS       10         70                                      */
     /*-------------------------------------------------------------*/
-    /*  13-4=7   63-12=51                                  */
+    /*  13-4=7   63-12=51                                          */
 
  //   draw_line (lines_origin, 3500, 2422);//  further experiments...
 
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 4d747ea..4668f2e 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -559,7 +559,7 @@ static void get_model_data_and_user_preferences(){
  *  JE CHOISIS DES CUBES AYANT DES COTÉS IMPAIRS POUR QU'IL Y AIT UNE CASE CENTRALE
  */
 
-    cube_side = 11;    //   0 < cube_side
+    cube_side = 3;    //   0 < cube_side
 
     int arrows_array_size = 0;
     while (*(arrows + arrows_array_size) != un_nombre_ad_hoc_que_je_mets_a_la_fin_du_tableau_pour_en_mesurer_la_taille)