请老师帮忙修改作业不太会

来源：2-13 编程练习

划过天空阿忠

2020-11-25 10:12:51

# 具体遇到的问题

# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

<!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>
       .bg {
           height: 400px;
           width: 600px;
           background: red;
           margin: 0 auto;
           position:relative;
       }
       .bg .star1 .box1 {
           width: 0;
           height: 0;
           border: 50px solid transparent;
           border-top-color: yellow;
           position:absolute;
           left:50px;
           top:50px;
       }

       .bg .star1 .box2 {
           width: 0;
           height: 0;
           border: 50px solid transparent;
           border-left-color: yellow;
           transform:rotate(73deg);
           position:absolute;
           left:50px;
           top:50px;
       }
       .bg .star1 .box3 {
           width: 0;
           height: 0;
           border: 50px solid transparent;
           border-left-color: yellow;
           transform:rotate(142deg);
           position:absolute;
           left:50px;
           top:50px;
       }
    </style>
</head>
<body>
    <div class="bg">
        <div class="star1">
            <div class="box1"></div>
            <div class="box2"></div>
            <div class="box3"></div>
        </div>
        <div class="star2">
            <div class="box1"></div>
            <div class="box2"></div>
            <div class="box3"></div>
        </div>
        <div class="star3">
            <div class="box1"></div>
            <div class="box2"></div>
            <div class="box3"></div>
        </div>
        <div class="star4">
            <div class="box1"></div>
            <div class="box2"></div>
            <div class="box3"></div>
        </div>
        <div class="star5">
            <div class="box1"></div>
            <div class="box2"></div>
            <div class="box3"></div>
        </div>
    </div>
</body>
</html>