CSS控制border画一棵小树-蒲公英云

CSS控制border画一棵小树

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
    #container{
        width: 300px;
        background: gray;
    }
    #trip1{
        width: 00px;
        margin-left: 20px;
        border-right-width: 100px;
        border-right-style: solid;
        border-right-color: gray;
        border-bottom-width: 100px;
        border-bottom-style: solid;
        border-bottom-color: green;
        border-left-width: 100px;
        border-left-style: solid;
        border-left-color: gray;
    }
    #trip2{
        width: 00px;
        border-right-width: 120px;
        border-right-style: solid;
        border-right-color: gray;
        border-bottom-width: 120px;
        border-bottom-style: solid;
        border-bottom-color: green;
        border-left-width: 120px;
        border-left-style: solid;
        border-left-color: gray;
    }
    #tang{
        background: brown;
        width: 40px;
        height: 150px;
        margin-left: 100px;
    }
</style>
</head>
<body>
<div id="container">
    <div id="trip1"></div>
    <div id="trip2"></div>
    <div id="tang"></div>
</div>
</body>
</html>