<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<html lang="en">
<head>
<style>
.line { width: 50px; height: 0px; border-top: 1px solid blue; margin-bottom: 100px; }
.container { width: 50px; height: 100px; border-top: 1px solid blue; border-bottom: 1px solid blue; background: green; }
</style>
</head>
<body>
<div class=line></div>
<div class=container></div>
</body>
</html>