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console 命令行工具 X clear

                    
>
console
<div class="outer">
    <div class="one"></div>
    <div class="two"></div>
    <div class="three"></div>
</div>
*{
    margin: 0;
    padding: 0;
    border: none;
    box-sizing: border-box;
}

body{
    background-color: white;
}
.outer{
  width: 800px;
  height: 400px;
  outline: 1px solid red;
  
  display: flex;
  justify-content: space-evenly;
  align-items: end;
}

.outer div{
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: green;
}

@keyframes jump{
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-200px);
  }

  100% {
    transform: translateY(0);
  }
}

.one, .two, .three{
  animation-name: jump;
  animation-duration: 1s;
  animation-iteration-count: 2;
}

.two{ animation-delay: 0.2s;}
.three{ animation-delay: 0.4s;}