diff --git a/8By8/8By8.ino b/8By8/8By8.ino
index ed72e79..800c7e7 100644
--- a/8By8/8By8.ino
+++ b/8By8/8By8.ino
@@ -38,7 +38,7 @@ public:
   }
 
   static void set_status(int x, int y, int z, int brightness) {
-    if (x >= 8 || x <= 0 || y >= 8 || y <= 0 || z >= 8 || z <= 0) {
+    if (x >= 8 || x < 0 || y >= 8 || y < 0 || z >= 8 || z < 0) {
         return;
     }
     brightness %= 4;