<html>
<head>
<style>
.indibar {
position: fixed;
z-index: 99;
top: 0px;
height: 4px;
background: #0cc261;
width: 0%;
}
</style>
</head>
<body>
<div class="indibar" id="indibar"></div>
<script>
window.onscroll = function () { scrollindi() };
function scrollindi() {
var scrolling = document.body.scrollTop || document.documentElement.scrollTop;
var pagescrollheight = document.documentElement.scrollHeight - document.documentElement.clientHeight;
var lefttoscroll = (scrolling / pagescrollheight) * 100;
document.getElementById("indibar").style.width = lefttoscroll + "%";
}
</script>
</body>
</html>