怎么修改这段代码

<style>
.stripes{height: 250px;width:100%;float: left;-webkit-background-size: 50px 50px;-moz-background-size: 50px 50px;background-size: 50px 50px;-moz-box-shadow: 1px 1px 8px gray;-webkit-box-shadow: 1px 1px 8px gray;box-shadow: 1px 1px 8px gray;}
.horizontal{background-color: #0ae;background-image: -webkit-gradient(linear, 0 0, 0 100%, color-stop(.5, rgba(255, 255, 255, .2)), color-stop(.5, transparent), to(transparent));background-image: -moz-linear-gradient(rgba(255, 255, 255, .2) 50%, transparent 50%, transparent);background-image: -o-linear-gradient(rgba(255, 255, 255, .2) 50%, transparent 50%, transparent);background-image: linear-gradient(rgba(255, 255, 255, .2) 50%, transparent 50%, transparent);}
</style>
<div class="horizontal stripes"></div>

这个的效果不好，只能在一块地方有背景，想把它改成整个网页都是这种背景，怎么改？