<div class="move-me move-me-1">steps(4, end)</div>
<br>
<div class="move-me move-me-2">steps(4, start)</div>
<br>
<div class="move-me move-me-3">no steps</div>

.move-me {
  display: inline-block;
  padding: 20px;
  color: white;
  position: relative;
  margin: 0 0 10px 0;
}
.move-me-1 {
  animation: move-in-steps 8s steps(4) infinite;
}
.move-me-2 {
  animation: move-in-steps 8s steps(4, start) infinite;
}
.move-me-3 {
  animation: move-in-steps 8s infinite;
}

body {
  padding: 20px;
}

@keyframes move-in-steps {
  0% {
    left: 0;
    background: blue;
  }
  100% {
    left: 100%;
    background: red;
  }
}