Use CSS to make a yellow, 1 pixel thick, border around all paragraphs.
<!DOCTYPE html>
<html>
<head>
<style>
@(1) {@(6): @(3) solid @(6);}
</style>
</head>
<body>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<style>
p {border: 1px solid yellow;}
</style>
</head>
<body>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
</body>
</html>