Solved: jQuery: Insert 30 empty span tags

Using jQuery, what is the best way to insert 30 empty span tags into a paragraph? My code below works but I want to do it with less code.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>
<style type="text/css">
span {
display: block;
border: 1px solid red; margin: 5px; float: left; height: 5px; width: 5px; background: blue;
}
</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
 $('p').append('<span />')
});

</script>
</head>
<body>

<p></p>

</body>
</html>

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