diff --git a/src/graphics/arrows.c b/src/graphics/arrows.c
index 4211a28..4a9b8f7 100644
--- a/src/graphics/arrows.c
+++ b/src/graphics/arrows.c
@@ -124,30 +124,33 @@ int write_one_arrow_vertex (int offset_vertex,
           vy = (2 * j / space_Y_int - 1) * space_Y_int / max + (1 / max),
           vz = (2 * k / space_Z_int - 1) * space_Z_int / max + (1 / max);
 
-    //    arrow_basis_width donne la dimension de l'étoile centrale
-    GLfloat arrow_basis_width = (1 / max) / 5;
+    //  ici,  arrow_basis_width = 0   <>  Plus d'étoile centrale
+    GLfloat arrow_basis_width = 0;  //  (1 / max) / 5;
+    graphics_write_vertex(vx, vy, vz);
+    graphics_write_color(0.3f, 0.3f, 0.3f);
+
 
     //    décale légèrement les pointes des flèches
     //    pour qu'elles n'aillent pas jusqu'aux faces des cubes
     GLfloat arrow_tip_padding = (1 / max) / 10;
 
-    //  X - X  axis - central star (basis)
-    graphics_write_vertex(vx + arrow_basis_width, vy, vz);
-    graphics_write_vertex(vx - arrow_basis_width, vy, vz);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
+    /* //  X - X  axis - central star (basis) */
+    /* graphics_write_vertex(vx + arrow_basis_width, vy, vz); */
+    /* graphics_write_vertex(vx - arrow_basis_width, vy, vz); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
 
-    //  Y - Y  axis - central star (basis)
-    graphics_write_vertex(vx, vy + arrow_basis_width, vz);
-    graphics_write_vertex(vx, vy - arrow_basis_width, vz);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
+    /* //  Y - Y  axis - central star (basis) */
+    /* graphics_write_vertex(vx, vy + arrow_basis_width, vz); */
+    /* graphics_write_vertex(vx, vy - arrow_basis_width, vz); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
 
-    //  Z - Z  axis - central star (basis)
-    graphics_write_vertex(vx, vy, vz + arrow_basis_width);
-    graphics_write_vertex(vx, vy, vz - arrow_basis_width);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
-    graphics_write_color(0.3f, 0.3f, 0.3f);
+    /* //  Z - Z  axis - central star (basis) */
+    /* graphics_write_vertex(vx, vy, vz + arrow_basis_width); */
+    /* graphics_write_vertex(vx, vy, vz - arrow_basis_width); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
+    /* graphics_write_color(0.3f, 0.3f, 0.3f); */
 
     GLfloat nuance = 0.24f;
 
@@ -169,7 +172,7 @@ int write_one_arrow_vertex (int offset_vertex,
     graphics_write_color(0.0f + nuance * 2, 0.0f + nuance * 2, 1.0f - nuance);
     graphics_write_color(1.0f - nuance / 3, 1.0f - nuance / 3, 0.0f + nuance);
 
-    return 12;
+    return 7;//12;
 }
 
 
@@ -182,13 +185,13 @@ int write_one_arrow_lines(int offset_vertex,
     /* graphics_write_line (offset_vertex + 4, offset_vertex + 5); */
 
     switch(site){
-    case EAST:   case WEST:   write_arrow_lines_east_west    (offset_vertex, weight, site); break;
-    case ZENITH: case NADIR:  write_arrow_lines_zenith_nadir (offset_vertex, weight, site); break;
-    case SOUTH:  case NORTH:  write_arrow_lines_south_north  (offset_vertex, weight, site); break;
+    case EAST:   case WEST:   graphics_write_line (offset_vertex + 0, offset_vertex + 1 + site % 2); break;
+    case ZENITH: case NADIR:  graphics_write_line (offset_vertex + 0, offset_vertex + 3 + site % 2); break;
+    case SOUTH:  case NORTH:  graphics_write_line (offset_vertex + 0, offset_vertex + 5 + site % 2); break;
     default: break;
     }
 
-    return 12;
+    return 7;
 }