#hamster {
  animation-name: drivingAround;
  animation-duration: 6000ms;
  animation-fill-mode: forwards;
  animation-iteration-count: infinite;
}

@keyframes drivingAround {
  0% {
    transform: translateX(0px);
  }

  48% {
    transform: translateX(600px);
  }
  50% {
    transform: rotateY(180deg) translateX(-600px);
  }
  98% {
    transform: translateX(0px) rotateY(180deg);
  }

  100% {
    transform: translateX(0px);
  }
}

/* solution */
article {
  position: relative;
}
article section {
  position: absolute;
  top: 2.44em;
  width: 700px;
  left: -700px;
  padding: 0 1em 0.5em 0.5em;
  background-color: rgba(199, 144, 81, 0.671);
  transition: transform 0.5s;
}
article section nav {
  width: 100%;
  text-align: right;
  background-color: rgba(16, 16, 16, 0.95);
  padding: 0.5em;
}

.visible {
  transform: translateX(690px);
}