<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">
<script src="script.js"></script>
</head>
<body>
<iframe id="main-frame" src="https://faizalluthfi.gitlab.io/notime-countdown-timer-demo"></iframe>
</body>
</html>
// Code goes here
html,
body,
#main-frame {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
border: 0;
}