whiteandblack.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>

    <style type="text/css">
        * {
            margin: 0px;
            padding: 0px;
        }

        body {
            background-image: url("register.png");
            background-color: #b8e5f8;
        }

        #main {
            width: 408px;
            height: 408px;
            border: 2px solid #fff;
            margin: 0px auto;
            border-radius: 10px;
            box-shadow: 0 1px 3px rgba(26, 26, 26, .1);
        }

        #con {
            width: 406px;
            height: 408px;
        }

        #btn {
            display: block;
            margin: 0px auto;
            margin-top: 20px;
            background: #0084ff;
            border-radius: 10px;
            color: #fff;
            cursor: pointer;
            width: 150px;
            height: 40px;
            border: none;
        }

        #h2 {
            margin: 15px;
            color: #fff;
        }

        #span1 {}
    </style>
    <link rel="stylesheet" type="text/css" href="whiteandblack.css" />
</head>

<body>
    <h2 id="h2">得分：<span id="span1">0</span></h2>
    <div id="main">
        <div id="con"></div>
    </div>
    <input type="button" id="btn" value="开始游戏" onclick="start()" />
     <!--2020/4/11 修改-->
    <script src="whiteandblack.js"></script>
</body>

</html>