<div class="ken"></div>

body {
  background: #000;
}

.ken {
  animation: kenny 60s linear;
  background-image: url('https://images.unsplash.com/photo-1548704686-f0a484c1bd67?crop=entropy&cs=tinysrgb&fm=jpg&ixid=MnwzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE2NzQ2ODk3NTI&ixlib=rb-4.0.3&q=80');
  background-size: cover;
  background-position: center;
  height: 100vh;
  width: 100vw;
  opacity: 1;
  overflow: hidden;
  scale: 2;
}

@keyframes kenny {
  100% {
    opacity: 0;
    scale: 1;
  }
}