diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 1b7b9fd..6a37b0e 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -30,6 +30,7 @@
 #include "../../include/graphics.h"
 #include "../../include/arrows.h"
 #include "../../include/grid.h"
+// #include <bits/stdc++.h> TODO
 
 #define VERTEX_SHADER_FILE "src/shaders/shader.vert"
 #define FRAG_SHADER_FILE "src/shaders/shader.frag"
@@ -676,7 +677,7 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     int rand(void);
     void srand(unsigned int seed);  //    printf ("Valeur max : %d\n", RAND_MAX);   min + rand() % (max+1 - min);
 
-    int arbitrary = 200;
+    int arbitrary = 0;
     int space_X = 1 + rand() % arbitrary,
         space_Y = 1 + rand() % arbitrary,
         space_Z = 1 + rand() % arbitrary;
@@ -689,14 +690,35 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
     int specif_arrows_nb = rand() % density_max / 3;
     int arrows_nb = 0;
 
-    while (arrows_nb < specif_arrows_nb){
+    /* while (arrows_nb < specif_arrows_nb){ */
+    /*     arrows_nb = set_arrow (arrows, arrows_nb, */
+    /*                            rand() % arbitrary + 1,  //    load / weight */
+    /*                            rand() % 6,          //    site, */
+    /*                            rand() % space_X,    //    x */
+    /*                            rand() % space_Y,    //    y */
+    /*                            rand() % space_Z);   //    z */
+    /* } */
+
+    //  clock_t start, end;
+
+    /* Recording the starting clock tick.*/
+    //  start = clock();
+
+    arbitrary = 24;
+    space_X = arbitrary; space_Y = arbitrary; space_Z = arbitrary;
+    density_max = space_X * space_Y * space_Z;
+    for (int i =0; i < space_X; i++)
+    for (int j =0; j < space_Y; j++)
+    for (int k =0; k < space_Z; k++)
+    for (int u =0; u < 6; u++)
         arrows_nb = set_arrow (arrows, arrows_nb,
-                               rand() % arbitrary,  //    load / weight
-                               rand() % 6,          //    site,
-                               rand() % space_X,    //    x
-                               rand() % space_Y,    //    y
-                               rand() % space_Z);   //    z
-    }
+                               1,  //    load / weight
+                               u,//i % 6,          //    site,
+                               i,//i % space_X,    //    x
+                               j,//i % space_Y,    //    y
+                               k//i % space_Z);
+                               );
+    //  end = clock();    printf("Elapsed time %ld\n", end - start);
 
     print_user_choices(arrows, arrows_nb, space_X, space_Y, space_Z, print_arrows_data, show_space_design);