diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 14bbb65..3a2f3c6 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -134,7 +134,8 @@ void graphics_write_vertex (GLfloat x, GLfloat y, GLfloat z)
     buffer_vertex_origin[buffer_vertex_size + 1] = y;
     buffer_vertex_origin[buffer_vertex_size + 2] = z;
 
-    if (0) printf("buffer_vertex_size = %d  (%6.3f,%6.3f,%6.3f)\n", buffer_vertex_size, x, y, z);
+    if (1) printf("In graphics_write_vertex() buffer_vertex_size = %d > %d (%6.3f,%6.3f,%6.3f)\n",\
+                  buffer_vertex_size, buffer_vertex_size + 3, x, y, z);
 
     buffer_vertex_size += 3;
 }
@@ -680,8 +681,8 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     void srand(unsigned int seed);  //    printf ("Valeur max : %d\n", RAND_MAX);   min + rand() % (max+1 - min);
 
     int arbitrary = 3;
-    int space_X = 1,// + rand() % arbitrary,
-        space_Y = 1,// + rand() % arbitrary,
+    int space_X = 3,// + rand() % arbitrary,
+        space_Y = 2,// + rand() % arbitrary,
         space_Z = 1;// + rand() % arbitrary;
     int density_max = space_X * space_Y * space_Z;
     int max = fmax(space_X, space_Y); max = fmax(max, space_Z);
@@ -731,17 +732,16 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
 
     /*   S P A C E    */
 
-//    float max = fmax(x, y);  max = fmax(max, z);
     buffer_vertex_size += write_space_ridges_vertex (buffer_vertex_size, space_X, space_Y, space_Z);
     buffer_colors_size = buffer_vertex_size;
 
-    if (0) printf("buffer_vertex_size after writing_space_ridges_vertex : %d (x 3 = %d)\n\n", buffer_vertex_size, buffer_vertex_size * 3);
+    if (1) printf("buffer_vertex_size after writing_space_ridges_vertex : %d (x 3 = %d)\n\n", buffer_vertex_size, buffer_vertex_size * 3);
 
     buffer_vertex_size += write_grids_on_space_faces_vertex (space_X, space_Y, space_Z);
     buffer_colors_size = buffer_vertex_size;
 
-    if (0) printf("buffer_vertex_size after writing_space_faces_vertex = %4d - 8 = %3d (x 3 = %4d)\n", buffer_vertex_size, buffer_vertex_size - 8, (buffer_vertex_size - 8) * 3);
-    if (0) printf("(space_X - 1) * 4 + (space_Y - 1) * 4 + (space_Z - 1) * 4 = %3d (x 3 = %4d)\n\n",\
+    if (1) printf("buffer_vertex_size after writing_space_faces_vertex = %4d - 8 = %3d (x 3 = %4d)\n", buffer_vertex_size, buffer_vertex_size - 8, (buffer_vertex_size - 8) * 3);
+    if (1) printf("(space_X - 1) * 4 + (space_Y - 1) * 4 + (space_Z - 1) * 4 = %3d (x 3 = %4d)\n\n",\
            (space_X - 1) * 4 + (space_Y - 1) * 4 + (space_Z - 1) * 4, ((space_X - 1) * 4 + (space_Y - 1) * 4 + (space_Z - 1)  * 4) * 3);
 
 
@@ -760,14 +760,14 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
         buffer_colors_size = buffer_vertex_size;
     }
 
-    if (0) printf("buffer_vertex_size after writing_arrows_vertex : %d (x 3 = %d)   (arrows_nb = %d)\n", buffer_vertex_size, buffer_vertex_size * 3, arrows_nb);
+    if (1) printf("buffer_vertex_size after writing_arrows_vertex : %d (x 3 = %d)   (arrows_nb = %d)\n", buffer_vertex_size, buffer_vertex_size * 3, arrows_nb);
 
 
     /*---------------------------------------------------------------*/
 
     /*                 L I N E S    S E C O N D                      */
 
-    buffer_vertex_size = 0; buffer_colors_size = 0; buffer_lines_size = 0;
+    //  buffer_vertex_size = 0; buffer_colors_size = 0; buffer_lines_size = 0;
 
     /*   S P A C E    */