diff --git a/8By8/8By8.ino b/8By8/8By8.ino
index 4b40e9c..cd05d6e 100644
--- a/8By8/8By8.ino
+++ b/8By8/8By8.ino
@@ -40,9 +40,9 @@ public:
   }
 
   static void set_status(int x, int y, int z, int brightness) {
-    x %= 8;
-    y %= 8;
-    z %= 8;
+    if (x >= 8 || x < 0 || y >= 8 || y < 0 || z >= 8 || z < 0) {
+        return;
+    }
     brightness %= 4;
     LED_status[z][x] =
         (LED_status[z][x] & (~(3 << (y * 2)))) | (brightness << (y * 2));