<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            overflow: hidden;
            height: 1000px;
        }
        .box {
            width: 100px;
            height: 100px;
            background-color: blue;
        }
        
        .background-fixed {
 	        background-image: linear-gradient(blue, green);
 	        background-size: 100% 100px;
            background-attachment: fixed;
        }
    </style>
</head>
<body>
<div class="background-fixed box">
</div>
</body>
</html>