Try it Editor

<!DOCTYPE html>  
<html>  
<head>  
<style>  
p {  
    background-color: green;  
}  
p.ex {  
    padding-top: 100px;  
    padding-bottom: 100px;  
    padding-right: 150px;  
    padding-left: 150px;  
}  
</style>  
</head>  
<body>  
<p>This paragraph is not displayed with specified padding. </p>  
<p class="ex">This paragraph is displayed with specified padding.</p>  
</body>  
</html>