波及効果

<div class="bg">
  <div class="jumper">
    <div></div>
    <div></div>
    <div></div>
  </div>
</div>

<style scoped>
.bg {
    
    
  background: #0099cc;
  height: 150px;
  width: 100%;
}
.jumper {
    
    
  display: block;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  width: 40px;
  height: 40px;
}
.jumper > div {
    
    
  background-color: #f4090a;
  width: 15px;
  height: 15px;
  border-radius: 100%;
  margin: 2px;
  animation-fill-mode: both;
  position: absolute;
  left: 0px;
  top: 0px;
  opacity: 0;
  margin: 0;
  width: 40px;
  height: 40px;
  animation: jumper 1.2s 0s linear infinite;
}
.jumper > div:nth-child(2) {
    
    
  -webkit-animation-delay: 0.33333s;
  animation-delay: 0.33333s;
}
.jumper > div:nth-child(3) {
    
    
  -webkit-animation-delay: 0.66666s;
  animation-delay: 0.66666s;
}
@keyframes jumper {
    
    
  0% {
    
    
    transform: scale(0);
    opacity: 0;
  }
  5% {
    
    
    opacity: 1;
  }
  100% {
    
    
    transform: scale(1);
    opacity: 0;
  }
}
</style>