play an alarm in 15 mins

alarm.js

function myFunction () {
    console.log('Executed!');
	var source = "https://firebasestorage.googleapis.com/v0/b/aminsbd-96be5.appspot.com/o/alarm.mp3?alt=media&token=c7597653-7d8b-44c6-9bb2-e8b9301dfe55"
 var audio = document.createElement("audio");
 //
 audio.autoplay = true;
 //
 audio.load()
 audio.addEventListener("load", function() { 
     audio.play(); 
 }, true);
 audio.src = source;
 alert('Cek hasil Scrape ya :)');
}

var interval = setInterval(function () { myFunction(); }, 900000);