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<!DOCTYPE HTML> 
<html> 
<head> 
<style> 
p { 
text-align: center; 
font-size: 60px; 
} 
div { 
font-family: "Courier";
text-align: center; 
font-size: 60px; 
color: #990000;
} 
</style> 
</head> 
<body> 
<div id="demo"></div> 
<script> 
var deadline = new Date("May 17, 2021 17:00:00").getTime(); 
var x = setInterval(function() { 
var now = new Date().getTime(); 
var t = deadline - now; 
if (t > 0) { 
	var days = Math.floor(t / (1000 * 60 * 60 * 24)); 
	var hours = Math.floor((t%(1000 * 60 * 60 * 24))/(1000 * 60 * 60)); 
	var minutes = Math.floor((t % (1000 * 60 * 60)) / (1000 * 60)); 
	var seconds = Math.floor((t % (1000 * 60)) / 1000); 
	document.getElementById("demo").innerHTML
		= ("00" + minutes).slice(-2) + ":" + ("00" + seconds).slice(-2); 
} else {
	document.getElementById("demo").innerHTML = "00:00"; 
}
}, 1000); 

</script> 

</body> 
</html>