<!DOCTYPE html>
<html>
<head>
<style>
#boxshadowDiv{
margin-bottom: 10px;
height: 100px;
width: 100px;
background: #555;
box-shadow: 5vmin 5vmin 1vmin 1vmin orange;
}
</style>
</head>
<body>
<div id="boxshadowDiv"></div>
</body>
</html>