利用svg如何实现背景动画效果

利用svg如何实现背景动画效果，下面web建站小编给大家详细介绍一下具体实现代码！

svg代码：

<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" viewBox="0 0 100 100">
  <defs>
    <style>
      @keyframes rotate {
        100% {
          transform: rotate(360deg);
        }
      }
      .out-top {
        animation: rotate 20s linear infinite;
        transform-origin: 13px 25px;
      }
      .in-top {
        animation: rotate 10s linear infinite;
        transform-origin: 13px 25px;
      }
      .out-bottom {
        animation: rotate 25s linear infinite;
        transform-origin: 84px 93px;
      }
      .in-bottom {
        animation: rotate 15s linear infinite;
        transform-origin: 84px 93px;
      }
    </style>
  </defs>
  <path fill="#9b5de5" class="out-top" d="M37-5C25.1-14.7,5.7-19.1-9.2-10-28.5,1.8-32.7,31.1-19.8,49c15.5,21.5,52.6,22,67.2,2.3C59.4,35,53.7,8.5,37-5Z"/>
  <path fill="#f15bb5" class="in-top" d="M20.6,4.1C11.6,1.5-1.9,2.5-8,11.2-16.3,23.1-8.2,45.6,7.4,50S42.1,38.9,41,24.5C40.2,14.1,29.4,6.6,20.6,4.1Z"/>
  <path fill="#00bbf9" class="out-bottom" d="M105.9,48.6c-12.4-8.2-29.3-4.8-39.4.8-23.4,12.8-37.7,51.9-19.1,74.1s63.9,15.3,76-5.6c7.6-13.3,1.8-31.1-2.3-43.8C117.6,63.3,114.7,54.3,105.9,48.6Z"/>
  <path fill="#00f5d4" class="in-bottom" d="M102,67.1c-9.6-6.1-22-3.1-29.5,2-15.4,10.7-19.6,37.5-7.6,47.8s35.9,3.9,44.5-12.5C115.5,92.6,113.9,74.6,102,67.1Z"/>
</svg>