<div class="container">
<p>Change the values of the <code>border-left</code> property to see how the top border changes.</p>
<div class="element">
<p>
I have a 5px solid green left border.
</p>
</div>
</div>
body {
background-color: #F5F5F5;
color: #555;
font-size: 1.1em;
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
.container {
margin: 40px auto 0;
max-width: 700px;
}
.element {
padding: 20px;
height: 200px;
background-color: white;
border-left: 5px solid #009966;
}