diff --git a/examples/css3d_periodictable.html b/examples/css3d_periodictable.html
index 5693e4ed1cba16140e3ab94dc5c958d89355efa6..ecc19982960d2872185a9d3342fd80f95e1702ce 100644
--- a/examples/css3d_periodictable.html
+++ b/examples/css3d_periodictable.html
@@ -262,7 +262,7 @@
 
 					var number = document.createElement( 'div' );
 					number.className = 'number';
-					number.textContent = i + 1;
+					number.textContent = (i/5) + 1;
 					element.appendChild( number );
 
 					var symbol = document.createElement( 'div' );