<html>
<head>
<style>
p {
background-color: yellow;
}
p.ex {
margin-top: 200px;
margin-bottom: 200px;
margin-right: 100px;
margin-left: 50px;
}
</style>
</head>
<body>
<p>This is a paragraph with no specified margins.</p>
<p class="ex">This is a paragraph with specified margins.</p>
</body>
</html>
