css 如何在垂直和水平方向重复背景图像

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
body
{
background-image:url('/images/online_demo/paper.gif');
}
</style>
</head>

<body>
<p>By default, a background image will be repeated both vertically and horizontally.</p>
</body>
</html>