How do I keep incrementing the Elapsed time variable while its in the while loop instead of starting from 0 seconds everytime

I have a while loop where I look for two attributes in the array, if they’re not there, then I invoke the sleep function for 10 seconds and look for those attributes again. I want there to be an Elapsed time there so that the user can see how long we’ve been looking for those attributes.

var flag1 = "false";
var flag2 = "false";

while (flag1 == "false" || flag2 == "false")
   for { //for loop where it looks for some attributes in an array and if found, changes the respective flag to true
   }

   //if conditions so if the flags are still false then prints not found and tells that it will check again
   if (flag1 == "false") {
       print ("Attribute 1 not found. Check again in 10 seconds");
   }
   if (flag2 == "false") {
       print ("Attribute 2 not found. Check again in 10 seconds");
   }
   
   //Stopwatch 
   var startTime = new Date();
   sleep (10000);
   var endTime = new Date();
   var timeDiff = endTime - startTime;
   timeDiff /= 1000;
   var seconds = Math.round(timeDiff % 60);
   print("Elapsed Time is " + seconds + "seconds");
}
print("Both attributes found."};

Expected output:

Attribute 1 not found Check again in 10 seconds.
Attribute 2 not found. Check again in 10 seconds.
Elapsed time: 0 seconds.

//after 10 seconds.
Attribute 1 not found Check again in 10 seconds.
Attribute 2 not found. Check again in 10 seconds.
Elapsed time: 10 seconds.

//after another 10 seconds.
Attribute 1 not found Check again in 10 seconds.
Attribute 2 not found. Check again in 10 seconds.
Elapsed time: 20 seconds.

//after another 10 seconds and assuming that the attribute was found in array this time.
Both attributes found.

Current Ouptut

Attribute 1 not found. Check again in 10 seconds.
Attribute 2 not found. Check again in 10 seconds.
Elapsed Time is 10seconds
Attribute 1 not found. Check again in 10 seconds.
Attribute 2 not found. Check again in 10 seconds.
Elapsed Time is 10seconds

The Elapsed time when printed always shows 10 seconds, I want it to keep incrementing. How would I do that?

Answer

Just move startTime declaration

var startTime = new Date();

before the while loop:

var startTime = new Date();

while (flag1 == "false" || flag2 == "false")
   .... 


   if (flag1 && flag2) {
     // if your condition is matched, exit the loop
     break;
   }
   //Stopwatch 
   sleep (10000);
   var endTime = new Date();
   var timeDiff = endTime - startTime; 
   timeDiff /= 1000;
   var seconds = Math.round(timeDiff % 60);
   print("Elapsed Time is " + seconds + "seconds");
}
print("Both attributes found."};