diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 0546687..de00fdd 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -888,8 +888,8 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     /* if (1) print_user_choices(arrows_ptr, arrows_nb, space_X, space_Y, space_Z, print_arrows_data, 0); */
 
     arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z,
-                               0,//rand() % arbitrary + 1,  //    load / weight
-                               0,//rand() % 6,          //    site,
+                               1,//rand() % arbitrary + 1,  //    load / weight
+                               2,//rand() % 6,          //    site,
                                0,//rand() % space_X,    //    x
                                0,//rand() % space_Y,    //    y
                                0);//rand() % space_Z);   //    z
@@ -897,18 +897,32 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     /* print_user_choices(arrows_ptr, arrows_nb, space_X, space_Y, space_Z, print_arrows_data, 0); */
 
     arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z,
-                               rand() % arbitrary + 1,  //    load / weight
-                               2,//rand() % 6,          //    site,
+                               1,//rand() % arbitrary + 1,  //    load / weight
+                               3,//rand() % 6,          //    site,
                                0,//rand() % space_X,    //    x
                                0,//rand() % space_Y,    //    y
                                0);//rand() % space_Z);   //    z
 
-    arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z,
-                               0,//rand() % arbitrary + 1,  //    load / weight
-                               1,//rand() % 6,          //    site,
-                               0,//rand() % space_X,    //    x
-                               0,//rand() % space_Y,    //    y
-                               0);//rand() % space_Z);   //    z
+    int address = 0;
+    if (1) printf("buffer_lines_0_arrow = %d   address = %d   buffer_lines_size = %d   >>>", buffer_lines_0_arrow, address, buffer_lines_size);
+    buffer_lines_origin [(long) buffer_lines_0_arrow + address * 2 + 1] = buffer_lines_origin[(long) buffer_lines_size - 3];
+    buffer_lines_origin [(long) buffer_lines_0_arrow + address * 2 + 2] = buffer_lines_origin[(long) buffer_lines_size - 2];
+
+    buffer_lines_size -= 2;
+
+    void *new_arrows_lines_ptr = g_realloc(buffer_lines_origin, buffer_lines_size * sizeof(GLfloat));
+    if (new_arrows_lines_ptr) buffer_lines_origin = new_arrows_lines_ptr;
+    else                       perror("In experience, can't re_allocate for arrow lines buffer.\n");
+    if (1) printf(">>>   buffer_lines_size = %d\n", buffer_lines_size);
+
+
+
+    /* arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z, */
+    /*                            0,//rand() % arbitrary + 1,  //    load / weight */
+    /*                            0,//rand() % 6,          //    site, */
+    /*                            0,//rand() % space_X,    //    x */
+    /*                            0,//rand() % space_Y,    //    y */
+    /*                            0);//rand() % space_Z);   //    z */
 
     /* print_user_choices(arrows_ptr, arrows_nb, space_X, space_Y, space_Z, print_arrows_data, 0); */