diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index c0dc646..d72068d 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -53,11 +53,11 @@ static int buffer_plans_size = 0;
 static GLuint arrows[] = {
       1,    0,    0, 0, 0,
       1,    1,    1, 0, 0,
-      /* 1,    1,    0, 0, 0, */
-      /* 1,    2,    0, 0, 0, */
-      /* 1,    3,    0, 0, 0, */
-      /* 1,    4,    0, 0, 0, */
-      /* 1,    5,    0, 0, 0, */
+      1,    1,    0, 0, 0,
+      1,    2,    0, 0, 0,
+      1,    3,    0, 0, 0,
+      1,    4,    0, 0, 0,
+      1,    5,    0, 0, 0,
 //  load, site,   x, y, z
 };
 
@@ -160,7 +160,7 @@ static bool erase_arrow (int address, int site, int x, int y, int z)
     return 1;
 }
 
-static int check_for_arrow (int site, int x, int y, int z)
+static int check_for_arrow (int weight, int site, int x, int y, int z)
 {
     int arrows_nb = get_arrows_nb();
     if (arrows_nb == 0) return -1;
@@ -174,7 +174,7 @@ static int check_for_arrow (int site, int x, int y, int z)
         f_y      = *(arrows + i * 5 + 3);
         f_z      = *(arrows + i * 5 + 4);
 
-        if (f_site == site && f_x == x && f_y == y && f_z == z) {
+        if (f_weight == weight && f_site == site && f_x == x && f_y == y && f_z == z) {
             address = i * 5;
             if (DETAIL) printf("arrows_nb = %d    checked arrow (%d,%d,%d,%d) found at address %d (line %d)",\
                    arrows_nb, site, x, y, z, address, address / 5);
@@ -215,7 +215,7 @@ static void show_arrows_array (int address, int weight, int site, int x, int y,
 
 static int set_arrow (int weight, int site, int x, int y, int z)
 {
-    int address = (check_for_arrow (site, x, y, z));
+    int address = (check_for_arrow (weight, site, x, y, z));
     show_arrows_array(address, weight, site, x, y, z);
 
     if (address == -1 && weight == 0) return 0;
@@ -790,7 +790,7 @@ void main_test_graphics (void)
     /* ARROWS */
     arrows_write_terminations (x, y, z);
 
-    int arrows_nb = get_arrows_nb();
+    int arrows_nb = get_arrows_nb(), cube_coord = 0;
 
     for (int i = 0; i < arrows_nb; i++) {
         weight = arrows[i * 5 + 0];
@@ -801,8 +801,8 @@ void main_test_graphics (void)
 
         set_arrow (weight, site, x, y, z);
 
-        /* // cube coordinates = 12 * (stx * x + sty * y + stz * z); */
-        arrow_offset = offset_after_grids + 12 * (stx * x + sty * y + stz * z);
+        cube_coord = 12 * (stx * x + sty * y + stz * z);
+        arrow_offset = offset_after_grids + cube_coord;
         arrows_write_basis (arrow_offset);
 
         switch(site){
@@ -819,6 +819,8 @@ void main_test_graphics (void)
                   offset_after_arrows, offset_after_arrows, offset_after_grids,\
                   difference, difference, difference / 12);
     if (0) printf("main_test_graphics [ok]\n");
+    if (1) printf("\n      Et maintenant, il faut distinguer les arrows-data des arrows-en-place\n\
+                              [to be]    vs.   [done]\n\n");
 }