</head>

<body>
<div id="topbox">
<?php
for($y=4;$y>=1;$y--){
echo "<div class="line{$y}"></div>n";
}
?>
</div>
<div id="box">
<div class="content"> aaaaaaaaaaaaaaaaaa</div>
</div>
<div id="bottombox">
<?php
for($y=1;$y<=4;$y++){
echo "<div class="line{$y}"></div>n";
}
?>
</div>
</body>
</html>