<div class="app">
  <div class="yuan19"></div>
</div>

/** style.css **/
.app{
  width: 100%;
  height: 100vh;
  background-color: #ffffff;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.yuan19{
  width: 20px;
  height: 66px;
  position: relative;
}
.yuan19:before{
  content: '';
  width: 20px;
  height: 20px;
  position: absolute;
  border-radius: 50%;
  background-color: #333;
  animation: yuan191 .5s ease infinite alternate;
}
@keyframes yuan191 {
  0% {
    top: 60px;
    height: 5px;
    border-radius: 50px 50px 25px 25px;
    transform: scaleX(1.5);
  }
  50% {
    height: 20px;
    border-radius: 50%;
    transform: scaleX(1);
  }
  100% {
    top: 0;
  }
}
.yuan19:after{
  content: '';
  width: 20px;
  height: 4px;
  border-radius: 50%;
  position: absolute;
  top: 62px;
  animation: yuan1912 .5s ease infinite alternate;
}
@keyframes yuan1912 {
  0% {
    filter: blur(1px);
    transform: scaleX(1.5);
    background-color: rgba(0,0,0,0.9);
  }
  50% {
    transform: scaleX(1);
    background-color: rgba(0,0,0,0.6);
  }
  100% {
    filter: blur(2px);
    transform: scaleX(0.5);
    background-color: rgba(0,0,0,0.3);
  }
}