<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">



<div style="text-align: center;">
<a href="DOWNLAOD LINK" id="download" class="button">Download File</a>
<button type="button" class="btn btn-outline-danger" id="btn" class="techly360">Click to Download</button>


<script>
var downloadButton = document.getElementById("download");
var counter = 10;
var newElement = document.createElement("p");
newElement.innerHTML = "CLICK TO DOWNLOAD";
var id;

downloadButton.parentNode.replaceChild(newElement, downloadButton);

function startDownload() {
    this.style.display = 'none';
    id = setInterval(function () {
        counter--;
        if (counter < 0) {
            newElement.parentNode.replaceChild(downloadButton, newElement);
            clearInterval(id);
        }  
else {
 newElement.innerHTML =  +counter.toString() + " <b> second.<br> Your download will start in a few seconds..</b>"; 
        }
    }, 1000);
};

var clickbtn = document.getElementById("btn");
clickbtn.onclick = startDownload;
</script>