#color-change-5x {                            /* 狂拽酷炫 五级变色 */
    -webkit-animation: color-change-5x 8s linear infinite alternate both;
            animation: color-change-5x 8s linear infinite alternate both;
              width: 100vw;
              height: 100vh;
  }
  
   @-webkit-keyframes color-change-5x {
      0% {
        background: #19dcea;
      }
      25% {
        background: #b22cff;
      }
      50% {
        background: #ea2222;
      }
      75% {
        background: #f5be10;
      }
      100% {
        background: #3bd80d;
      }
    }
    @keyframes color-change-5x {
      0% {
        background: #19dcea;
      }
      25% {
        background: #b22cff;
      }
      50% {
        background: #ea2222;
      }
      75% {
        background: #f5be10;
      }
      100% {
        background: #3bd80d;
      }
    }