diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index f7eabfc..44231ca 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -903,7 +903,8 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
                                0,//rand() % space_Y,    //    y
                                0);//rand() % space_Z);   //    z
 
-    int address = 0;
+    int address = 3;
+
     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 + 0] = buffer_lines_origin[(long) buffer_lines_size - 2];
     buffer_lines_origin [(long) buffer_lines_0_arrow + address * 2 + 1] = buffer_lines_origin[(long) buffer_lines_size - 1];
@@ -915,6 +916,22 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     else                       perror("In experience, can't re_allocate for arrow lines buffer.\n");
     if (1) printf(">>>   buffer_lines_size = %d\n", buffer_lines_size);
 
+    if (1) printf("buffer_vertex_0_arrow = %d   address = %d   buffer_vertex_size = %d   >>>", buffer_vertex_0_arrow, address, buffer_vertex_size);
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 0] = buffer_vertex_origin[(long) buffer_vertex_size - 6];
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 1] = buffer_vertex_origin[(long) buffer_vertex_size - 5];
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 2] = buffer_vertex_origin[(long) buffer_vertex_size - 4];
+
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 3] = buffer_vertex_origin[(long) buffer_vertex_size - 3];
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 4] = buffer_vertex_origin[(long) buffer_vertex_size - 2];
+    buffer_vertex_origin [(long) buffer_vertex_0_arrow + address * 6 + 5] = buffer_vertex_origin[(long) buffer_vertex_size - 1];
+
+    buffer_vertex_size -= 6;
+
+    void *new_arrows_vertex_ptr = g_realloc(buffer_vertex_origin, buffer_vertex_size * sizeof(GLfloat));
+    if (new_arrows_vertex_ptr) buffer_vertex_origin = new_arrows_vertex_ptr;
+    else                       perror("In experience, can't re_allocate for arrow vertex buffer.\n");
+    if (1) printf(">>>   buffer_vertex_size = %d\n", buffer_vertex_size);
+
 
 
     /* arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z, */