diff --git a/src/graphics/grid.c b/src/graphics/grid.c
index 1b846bc..2e7ed0f 100644
--- a/src/graphics/grid.c
+++ b/src/graphics/grid.c
@@ -54,7 +54,7 @@ void write_marks_along_space_ridges (long x, long y, long z)
 {
     float i, j, k, vx, vy, vz, max = fmax(x, y);
                                max = fmax(max, z);
-    //  printf("\n");
+
     for (i = 0; i <= x; i++)
         for (j = 0; j <= y; j++)
             for (k = 0; k <= z; k++){
@@ -63,17 +63,19 @@ void write_marks_along_space_ridges (long x, long y, long z)
                 vy = (2 * j / y - 1) * y / max;
                 vz = (2 * k / z - 1) * z / max;
 
-                if ((i == 0 && j == 0) || (i == 0 && j == y) || (i == x && j == 0) || (i == x && j == y)
+                if (
+                    (i == 0 && j == 0) || (i == 0 && j == y) || (i == x && j == 0) || (i == x && j == y)
                 ||  (i == 0 && k == 0) || (i == 0 && k == z) || (i == x && k == 0) || (i == x && k == z)
-                ||  (j == 0 && k == 0) || (j == 0 && k == z) || (j == y && k == 0) || (j == y && k == z))
-
-                    graphics_write_vertex (vx, vy, vz);
+                ||  (j == 0 && k == 0) || (j == 0 && k == z) || (j == y && k == 0) || (j == y && k == z)
+                )
+                graphics_write_vertex (vx, vy, vz);
             };
 
-    int buffer_lines_offset = 24;
 
-    graphics_write_line (buffer_lines_offset + 0,  buffer_lines_offset + 2);
-    graphics_write_line (buffer_lines_offset + 1,  buffer_lines_offset + 3);
+    int buffer_lines_offset = 12;
+
+    graphics_write_line (buffer_lines_offset + 5,  buffer_lines_offset + 25);
+    graphics_write_line (buffer_lines_offset + 6,  buffer_lines_offset + 26);
 
     graphics_write_line (buffer_lines_offset + 1,  buffer_lines_offset + 0);
     graphics_write_line (buffer_lines_offset + 2,  buffer_lines_offset + 3);
@@ -81,8 +83,29 @@ void write_marks_along_space_ridges (long x, long y, long z)
     graphics_write_line (buffer_lines_offset + 8,  buffer_lines_offset + 9);
     graphics_write_line (buffer_lines_offset + 10,  buffer_lines_offset + 11);
 
-    graphics_write_line (buffer_lines_offset + 5,  buffer_lines_offset + 13);
-    graphics_write_line (buffer_lines_offset + 6,  buffer_lines_offset + 14);
+    graphics_write_line (buffer_lines_offset + 9,  buffer_lines_offset + 11);
+    graphics_write_line (buffer_lines_offset + 8,  buffer_lines_offset + 10);
+
+    graphics_write_line (buffer_lines_offset + 12,  buffer_lines_offset + 13);
+    graphics_write_line (buffer_lines_offset + 14,  buffer_lines_offset + 15);
+
+    graphics_write_line (buffer_lines_offset + 12,  buffer_lines_offset + 14);
+    graphics_write_line (buffer_lines_offset + 13,  buffer_lines_offset + 15);
+
+    graphics_write_line (buffer_lines_offset + 20,  buffer_lines_offset + 21);
+    graphics_write_line (buffer_lines_offset + 22,  buffer_lines_offset + 23);
+
+    graphics_write_line (buffer_lines_offset + 1,  buffer_lines_offset + 21);
+    graphics_write_line (buffer_lines_offset + 2,  buffer_lines_offset + 22);
+
+    graphics_write_line (buffer_lines_offset + 0,  buffer_lines_offset + 20);
+    graphics_write_line (buffer_lines_offset + 3,  buffer_lines_offset + 23);
+
+    graphics_write_line (buffer_lines_offset + 17,  buffer_lines_offset + 25);
+    graphics_write_line (buffer_lines_offset + 18,  buffer_lines_offset + 26);
+
+    graphics_write_line (buffer_lines_offset + 5,  buffer_lines_offset + 25);
+    graphics_write_line (buffer_lines_offset + 6,  buffer_lines_offset + 26);
 }