当我在 CSS 中实现背景时，它覆盖了整个页面，但长度不足以覆盖我想要在其中写入的内容。我研究并发现了一个背景重复-y，我认为它会再次复制背景，使页面更长。当我编码背景重复时：y; } 到 CSS 中，它给了我想要的长度，但是分割了背景，所以它不会覆盖整个页面。大部分是白色的。我究竟做错了什么？谢谢。
HTML：
<!DOCTYPE html>
<html>
<head>
<link href='http://fonts.googleapis.com/css?family=Lobster' rel='stylesheet' type='text/css'>
<link rel="stylesheet" type="text/css" href="aboutme.css">
<title>It's all about me!</title>
</head>
<body>
<div id="content">
<header>
<div class="grow">
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="aboutme.html">About me</a></li>
<li><a href="like.html">What I love</a></li>
</ul>
</div>
</header>
<h1>About Me</h1>
<img src="ben.jpg" id="ben">
<b><h2>The beginning of coding:</h2></b>
<img src="runescape.jpg">
</div>
<p></p>
</body>
</html>
CSS：
body {
background-image: url(halftone.png);
background-repeat: repeat-y;
width: 1000px;
height: 4000px;
}
h1 { font-family: 'Lobster', cursive;
color: black;
position: absolute;
top: 25px;
left: 540px;
text-decoration: underline;
}
h2 {font-family: 'lobster', cursive;
color: black;
position: absolute;
top: 540px;
left: 480px;
text-decoration: underline;
}
p { font-family: 'Lobster', cursive;
font-size: 20px;
color: white;
position: absolute;
top: 300px;
left: 320px;
display: 0px auto;
}
#runescape {
position: absolute;
top: 500px;
}
#pagesize {
max-height: 10000px;
}
#ben {
position: absolute;
top: 130px;
left: 290px;
width: 700px;
height: 400px;
}
.grow {
position: absolute;
left: 550px;
top: 700px;
}
a {
color: black;
text-decoration: none;
font-weight: bold;
}
ul {
padding: 10px;
background: #dcf3ff;
border-width: 6px;
border-style: solid;
border-color: white;
}
li {
display: inline;
padding: 0px 15px 0px 15px;
border-right: 2px solid black;
border-left: 2px solid black;
}
#cameron {
position: absolute;
top: 285px;
left: 220px;
}
#pastcoding {
position: absolute;
top: 100px;
}
.grow {
display: inline-block;
-webkit-transition-duration: 0.7s;
transition-duration: 0.7s;
-webkit-transition-property: -webkit-transform;
transition-property: transform;
-webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);
box-shadow: 0 0 1px rgba(0, 0, 0, 0);
}
.grow:hover {
-webkit-transform: scale(1.3);
-ms-transform: scale(1.3);
transform: scale(1.3);
}