redirect.html

<h3>
  Redirecting to google.com.com after <span id="countdown">20</span> seconds
</h3>
<script type="text/javascript">
    var seconds = 20;    
    function countdown() {
        seconds = seconds - 1;
        if (seconds < 0) {
            window.location = "https://google.com";
        } else {
            document.getElementById("countdown").innerHTML = seconds;
            window.setTimeout("countdown()", 2000);
        }
    }
    countdown();    
</script>