<div class="box"></div>
<div class="footer">
  Нажмите "RERUN", чтобы запустить анимацию
</div>

.footer {
  margin-top: 150px;
  width:100%;
  text-align:center;
  background: darkgrey;
  padding:2% 0;
  color:#fff;
  font-size:20px;
}
.box {
  width: 100px;
  height: 100px;
  background: blue;
  position:relative;
  animation: move 2s ease-in-out 1 both, width 2s ease-in-out 2s 1 both;
}
@keyframes move {
  0% {
    top:0;
  }
  100% {
    top:80px;
  }
}
@keyframes width {
  0% {
    width: 100px;
  }
  100% {
    width: 300px;
  }
}