body {
  margin: 0;
  padding: 0;
}

.background {
  height: 100vh;
  background: url(bg.jpg);
  background-position: bottom left;
  animation: driving 10s linear infinite;
}

.car {
  position: absolute;
  left: 300px;
  bottom: -50px;
  width: 200px;
}

.motorbike {
  position: absolute;
  left: 700px;
  bottom: 55px;
  width: 150px;
}

@keyframes driving {
  from {
    background-position: bottom left;
  }

  to {
    background-position: bottom right;
  }
}