console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a {
            width: 300px;
            height: 300px;
            background-color: pink;
        }
        
        .b {
            float: left;
            background-color: red;
            width: 100px;
            height: 100px;
        }
        
        .c {
            float: right;
            background-color: yellow;
            width: 100px;
            height: 100px;
        }
        
        .d {
            float: left;
            background-color: black;
            width: 100px;
            height: 100px;
        }
        
        .e {
            float: left;
            background-color: black;
            width: 100px;
            height: 100px;
        }
        
        .f {
            float: left;
            background-color: white;
            width: 100px;
            height: 100px;
        }
        
        .g {
            float: left;
            background-color: black;
            width: 100px;
            height: 100px;
        }
        
        .h {
            float: left;
            background-color: green;
            width: 100px;
            height: 100px;
        }
        
        .i {
            float: left;
            background-color: black;
            width: 100px;
            height: 100px;
        }
        
        .j {
            float: left;
            background-color: blue;
            width: 100px;
            height: 100px;
        }
    </style>
</head>

<body>
    <div class="a">
        <div class="b">红</div>
        <div class="c">黄</div>
        <div class="d">黑</div>
        <div class="e">黑</div>
        <div class="f">白</div>
        <div class="g">黑</div>
        <div class="h">绿</div>
        <div class="i">黑</div>
        <div class="j">蓝</div>
    </div>
</body>

</html>