diff --git a/index.html b/index.html
index 10f8215..7b95c9a 100644
--- a/index.html
+++ b/index.html
@@ -20,6 +20,7 @@
         var mast;
 
         function bgColor() {
+            console.log("innerHeight = " + window.innerHeight + ", window.scrollY = " + window.scrollY);
             var p = ((window.innerHeight - window.scrollY) / window.innerHeight); //calulate ratio of scroll
             console.log(p);
             x.innerHTML = " " + String(parseInt(p * 100)); //display it