diff --git a/include/buffers.h b/include/buffers.h
index 5df5e51..2d7d759 100644
--- a/include/buffers.h
+++ b/include/buffers.h
@@ -44,5 +44,7 @@ bool compute_space_and_arrows(long model_space_size_x,
                               GLuint *line_origin,
                               GLuint *plan_origin);
 
-
+bool draw_some_arrows (GLuint *lines_origin,
+                       long s, long stx, long sty,
+                       GLuint *arrows, int arrows_nb);
 
diff --git a/src/graphics/buffers.c b/src/graphics/buffers.c
index 470b051..0cc81b8 100644
--- a/src/graphics/buffers.c
+++ b/src/graphics/buffers.c
@@ -467,7 +467,7 @@ static void draw_some_arrows_demo (GLuint *lines_origin,
         draw_an_arrow_North_or_South (lines_origin, s + 1 + 12 * (stx * a + sty * b + stz * c), 1, SOUTH);
 }
 
-static void draw_some_arrows (GLuint *lines_origin, long s, long stx, long sty,
+bool draw_some_arrows (GLuint *lines_origin, long s, long stx, long sty,
                               GLuint *arrows, int arrows_nb)
 {
     long stz = 1;
@@ -485,6 +485,7 @@ static void draw_some_arrows (GLuint *lines_origin, long s, long stx, long sty,
         if (site > 3 && site < 6) draw_an_arrow_North_or_South (lines_origin, s + 1 + 12 * (stx * x + sty * y + stz * z), 1, site);
         if (site > 1 && site < 4) draw_an_arrow_Zenith_or_Nadir (lines_origin, s + 1 + 12 * (stx * x + sty * y + stz * z), 1, site);
     }
+    return 1;
 }
 
 
@@ -589,10 +590,10 @@ bool compute_space_and_arrows(long model_size_x, long model_size_y, long model_s
     if (pref_show_grid > 0) draw_ridges_3D (model_size_x, model_size_y, model_size_z, step_x, step_y, step_z, lines_origin);
     if (pref_test_diagonal) diagonal_test  (model_size_x, model_size_y, model_size_z, step_x, step_y, step_z, lines_origin);
 
-    long s = step_z * model_size_z + step_y * model_size_y + step_x * model_size_x;
+//    long s = step_z * model_size_z + step_y * model_size_y + step_x * model_size_x;
 
-    if (0) draw_some_arrows_demo (lines_origin, s, model_size_x, model_size_y, model_size_z, arrows, model_arrows_nb);
-    if (1) draw_some_arrows (lines_origin, s, model_size_z * model_size_y, model_size_z, arrows, model_arrows_nb);
+//    if (0) draw_some_arrows_demo (lines_origin, s, model_size_x, model_size_y, model_size_z, arrows, model_arrows_nb);
+//    if (0) draw_some_arrows (lines_origin, s, model_size_z * model_size_y, model_size_z, arrows, model_arrows_nb);
 
  //   draw_a_cube_at(1, 1, 1, lines_origin, model_size_x, model_size_y, model_size_z, 0);
 
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 34620d8..03263bb 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -721,6 +721,16 @@ void graphics_init_buffers(const void *gl_area)
                               buffer_lines_origin,
                               buffer_plans_origin);
 
+    long step_z = 1,
+         step_y =  model_space_size_z + 1,
+         step_x = (model_space_size_z + 1) * (model_space_size_y + 1);
+    long s = step_z * model_space_size_z + step_y * model_space_size_y
+            + step_x * model_space_size_x;
+
+    draw_some_arrows (buffer_lines_origin, s,
+                      model_space_size_z * model_space_size_y, model_space_size_z,
+                      arrows, model_arrows_nb);
+
     GLuint vao, vertex_buffer, color_buffer;
 
     glGenBuffers(1, &vertex_buffer);
@@ -822,3 +832,4 @@ void graphics_draw(const void *gl_area)
 
 
 
+