#mariokart {
  animation-name: drivingAround;
  animation-duration: 9s;
  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(16, 16, 16, 0.95);
  transition: transform 0.5s;
}

article section nav {
  width: 110%;
  text-align: right;
  background-color: rgba(16, 16, 16, 0.95);
  padding: 0.5em;
}

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