diff --git a/scripts/bread.js b/scripts/bread.js
index f892c66..fe022ef 100644
--- a/scripts/bread.js
+++ b/scripts/bread.js
@@ -441,16 +441,19 @@ function mouseReleased(){
 //Calculate the standard deviation of a set of values in arr = [p1,p2,...]
 function std(arr){
   var mean = 0;
-  for (var i =0; i<arr.length;i++){
+  var i = 0;
+  for (; i < arr.length; i++){
     mean += arr[i]
   }
-  mean /= arr.length;
+  var divisor = 1 / arr.length;
+  mean *= divisor;
   var stdval = 0;
-  for (var i =0; i<arr.length;i++){
-    stdval += pow((arr[i]-mean),2)
+  var diff;
+  for (i = 0; i < arr.length; i++) {
+    diff = arr[i] - mean;
+    stdval += diff * diff * divisor;
   }
-  return sqrt(stdval);
-  
+  return Math.sqrt(stdval);
 }
 
 //Update the canvas look by overlaying the cutting board over the slicing lines. then update the message response in accordance to a 'eveness' score calculated using standard deviation of the areas of all the regions.
@@ -519,7 +522,10 @@ function check_and_update_board(){
       var randomNum = round(random(0,paMessages5_1.length-1));
       $("#messageResponse").text(paMessages5_1[randomNum]);
     }
-    
+    else {
+      var randomNum = round(random(0,paMessages4.length-1));
+      $("#messageResponse").text(paMessages4[randomNum]);
+    }
   } 
 }