.box{
    width: 20px;
    height: 20px;
    background-color: red;
    position: 50wv;
    animation-name: example;
    animation-duration: 4s;
    animation-iteration-count: 2;
    animation-direction: infinite;
}

@keyframes example {
    from {background-color:red; left:0px;}
    to  {background-color:yellow; left:200px; top:0px;}
  }