body {
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
}

@keyframes backgroundchange {
  0% {
    left: 0;
  }
  10% {
    left: 0;
  }
  20% {
    left: -100%;
  }
  30% {
    left: -100%;
  }
  40% {
    left: -200%;
  }
  50% {
    left: -200%;
  }
  60% {
    left: -200%;
  }
  70% {
    left: -100%;
  }
  80% {
    left: -100%;
  }
  90% {
    left: 0;
  }
  100% {
    left: 0;
  }
}

div img {
  float: left;
  width: 20%;
}

div {
  position: relative;
  width: 500%;
  animation: backgroundchange 10s infinite;
  background-size: cover;
}

/*
section {
  background-image: url("https://www.freedigitalphotos.net/images/img/homepage/394230.jpg");
  width: 100%;
  height: 100vh;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  animation: changebackground 5s infinite;
}

 section {
  width: 600px;
  height: 100vh;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

@keyframes changebackground {
  0% {
    transform: translateX(0%);
    background-image: url("https://www.freedigitalphotos.net/images/img/homepage/394230.jpg");
  }
  25% {
    transform: translateX(100%);

    background-image: url("https://www.gettyimages.com/gi-resources/images/500px/983794168.jpg");
  }
  100% {
    transform: translateX(100%);

    background-image: url("https://photojournal.jpl.nasa.gov/jpeg/PIA23689.jpg");
  }
}

/* https://www.gettyimages.com/gi-resources/images/500px/983794168.jpg */