diff --git a/src/graphics/arrows.c b/src/graphics/arrows.c
index 9d5c9aa..cc3e4f6 100644
--- a/src/graphics/arrows.c
+++ b/src/graphics/arrows.c
@@ -64,15 +64,15 @@ int write_one_arrow_vertex (int space_X_int, int space_Y_int, int space_Z_int,
         break;
     case ZENITH:
         graphics_write_vertex (vx, vy - (site % 2 - 1) * (1 / max) + (site % 2 - 1) * arrow_tip_padding, vz, print);
-        graphics_write_color(0.0f, 1.0f, 0.0f);
+        graphics_write_color(0.0f, 0.9f, 0.0f);
         break;
     case NADIR:
         graphics_write_vertex (vx, vy - (site % 2) * (1 / max) + (site % 2) * arrow_tip_padding, vz, print);
-        graphics_write_color(0.7f, 0.2f, 0.2f);
+        graphics_write_color(0.7f, 0.3f, 0.9f);
         break;
     case SOUTH:
         graphics_write_vertex (vx, vy, vz + (site % 2 - 1) * (1 / max) - (site % 2 - 1) * arrow_tip_padding, print);
-        graphics_write_color(0.3f, 0.1f, 0.6f);
+        graphics_write_color(0.0f, 0.4f, 1.0f);
         break;
     case NORTH:
         graphics_write_vertex (vx, vy, vz + (site % 2) * (1 / max) - (site % 2) * arrow_tip_padding, print);
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index a9ad608..9e4d7eb 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -903,9 +903,10 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
                                0,//rand() % space_Y,    //    y
                                0);//rand() % space_Z);   //    z
 
-    int address = 3;
+    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);
+    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];
 
@@ -934,6 +935,34 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
 
 
 
+
+
+
+
+    printf("buffer_lines_0_arrow = %d\n", buffer_lines_0_arrow);
+
+    for (long h = buffer_lines_0_arrow - 6; h < buffer_lines_size + 6; h++) {
+        if (h == buffer_lines_0_arrow) printf("\n");
+        if (h == buffer_lines_0_arrow + 6) printf("\n");
+        if (h % 2 == 0) printf("\n");
+        printf("%2d ", buffer_lines_origin [h]);
+    }
+    printf("\n");
+
+    for (long a = buffer_vertex_0_arrow - 3; a < buffer_vertex_size; a++) {
+        if (a % 6 == 0) printf("\n");
+        if (a % 3 == 0) printf("\n");
+        printf("%5.2f ", buffer_vertex_origin [a]);
+    }
+    printf("\n");
+
+
+
+
+
+
+
+
     /* arrows_nb = set_arrow (arrows_ptr, arrows_nb, space_X, space_Y, space_Z, */
     /*                            0,//rand() % arbitrary + 1,  //    load / weight */
     /*                            0,//rand() % 6,          //    site, */