请老师检查谢谢

<!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>
    /* body{
      background: url('./img/a.png') no-repeat;
    } */
.triangle1,.triangle1::before,.triangle1::after{
  border:45px solid transparent;
  border-top:33px solid yellow;
  position: absolute;
width: 0;
height: 0;
transform: translate(44px,66px);
}
.triangle1::before,.triangle1::after{
  content: '';
  display: block;
}
.triangle1::before {
    transform: translate(-63px,-39px) rotate(70deg);
    transform-origin: 50px 33px;
}

.triangle1::after {
    transform: translate(-29px,-49px) rotate(-71deg);
    transform-origin: 50px 33px;
}
.content{
  width: 450px;
  height: 300px;
  background-color: red;
 
}
.triangle1:first-child{
  transform: translate(35px,64px);
}
.triangle1:nth-child(2){
            transform: translate(108px) scale(0.3) rotate(23deg);
        }
        .triangle1:nth-child(3){
            transform: translate(138px,29px) scale(0.3) rotate(47deg);
        }
        .triangle1:nth-child(4){
            transform: translate(143px,76px) scale(0.3);
        }
        .triangle1:nth-child(5){
            transform: translate(108px,107px) scale(0.3) rotate(21deg);
        }
  </style>
</head>
<body>
  <div class="content">
    <div class="triangle1"></div>
    <div class="triangle1"></div>
    <div class="triangle1"></div>
    <div class="triangle1"></div>
    <div class="triangle1"></div>
  </div>
</body>
</html>

闪电打雷躲树下 2022-08-30

源自：2D与3D转换 2-13 编程练习