五星红旗

<!DOCTYPE html>
  <html lang="en">

  <head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
        border-width: 0;
    }

    .flag {
        width: 300px;
        height: 200px;
        background: red;
        position: relative;

    }

    .pentagramMain {
        margin-top: 40.73px;
        margin-left: 21.47px;
        width: 0;
        height: 0;
        border-top-color: yellow;
        border-left-color: transparent;
        border-right-color: transparent;
        border-top-width: 20.73px;
        border-left-width: 28.53px;
        border-right-width: 28.53px;
        border-style: solid;
        position: absolute;
    }

    .pentagramMain::before {
        border-width: 0;
        content: '';
        display: block;
        width: 0;
        height: 0;
        border-top-color: yellow;
        border-left-color: transparent;
        border-right-color: transparent;
        border-top-width: 20.73px;
        border-left-width: 28.53px;
        border-right-width: 28.53px;
        border-style: solid;
        position: absolute;
        top: -20.73px;
        left: -28.53px;
        transform: rotate(72deg);
        transform-origin: 28.53px 9.27px;
    }

    .pentagramMain::after {
        border-width: 0;
        content: '';
        display: block;
        width: 0;
        height: 0;
        border-top-color: yellow;
        border-left-color: transparent;
        border-right-color: transparent;
        border-top-width: 20.73px;
        border-left-width: 28.53px;
        border-right-width: 28.53px;
        border-style: solid;
        position: absolute;
        top: -20.73px;
        left: -28.53px;
        transform: rotate(-72deg);
        transform-origin: 28.53px 9.27px;
    }

    /* 小五角星 */
    .pentagram {
        width: 0;
        height: 0;
        position: absolute;
        border-top: 6.91px solid yellow;
        border-left: 9.51px solid transparent;
        border-right: 9.51px solid transparent;
        transform-origin: 9.51px 3.09px;

    }

    .pentagram::before {
        position: absolute;
        width: 0;
        height: 0;
        content: '';
        display: block;
        border-top: 6.91px solid yellow;
        border-left: 9.51px solid transparent;
        border-right: 9.51px solid transparent;
        top: -6.91px;
        left: -9.51px;
        transform: rotate(72deg);
        transform-origin: 9.51px 3.09px;

    }

    .pentagram::after {
        border-width: 0;
        content: '';
        display: block;
        width: 0;
        height: 0;
        border-top-color: yellow;
        border-left-color: transparent;
        border-right-color: transparent;
        border-top: 6.91px solid yellow;
        border-left: 9.51px solid transparent;
        border-right: 9.51px solid transparent;
        border-style: solid;
        position: absolute;
        top: -6.91px;
        left: -9.51px;
        transform: rotate(-72deg);
        transform-origin: 9.51px 3.09px;
    }

    .one {
        top: 16.91px;
        left: 90.49px;
        transform: rotate(-48.96deg);

    }

    .two {
        top: 36.91px;
        left: 110.49px;
        transform: rotate(-26.13deg);

    }

    .three {
        top: 66.91px;
        left: 110.49px;
        transform: rotate(-2.06deg);

    }

    .four {
        top: 86.91px;
        left: 90.49px;
        transform: rotate(20.66deg);
    }
</style>
</head>

<body>
<div class='flag'>
    <div class='pentagramMain'></div>
    <div class='pentagram one'></div>
    <div class='pentagram two'></div>
    <div class='pentagram three'></div>
    <div class='pentagram four'></div>
</div>
</body>
</html>
推荐阅读更多精彩内容
