<!DOCTYPE html>
<html>
<head>
<style>
#boxshadowDiv{
margin-bottom: 10px;
height: 100px;
width: 100px;
background: #555;
box-shadow: -5vh -2vw 1vh 1vw orange;
}
</style>
</head>
<body>
<div id="boxshadowDiv"></div>
</body>
</html>