Pure CSS / CSS3 Slideshow with Image Panning and zooming Effect

A pure HTML / CSS background slideshow that uses CSS3 animations to create ken burns effect (image panning and zooming) during image transitions.

How to use it:

Build the html structure for the background slideshow using figure tag.

<div class="pic-wrapper">
  <figure class="pic-1"></figure>
  <figure class="pic-2"></figure>
  <figure class="pic-3"></figure>
  <figure class="pic-4"></figure>
</div>

Style the slideshow and make it fullscreen.

* {
  margin: 0;
  padding: 0;
}
.pic-wrapper {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
figure {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  /*animation*/
  
  animation: slideShow 24s linear infinite 0s;
  -o-animation: slideShow 24s linear infinite 0s;
  -moz-animation: slideShow 24s linear infinite 0s;
  -webkit-animation: slideShow 24s linear infinite 0s;
}

Add background images into the slideshow.

.pic-1 {
  opacity: 1;
  background: url(1.jpg) no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
.pic-2 {
  animation-delay: 6s;
  -o-animation-delay: 6s;
  -moz--animation-delay: 6s;
  -webkit-animation-delay: 6s;
  background: url(2.jpg) no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
.pic-3 {
  animation-delay: 12s;
  -o-animation-delay: 12s;
  -moz--animation-delay: 12s;
  -webkit-animation-delay: 12s;
  background: url(3.jpg) no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
.pic-4 {
  animation-delay: 18s;
  -o-animation-delay: 18s;
  -moz--animation-delay: 18s;
  -webkit-animation-delay: 18s;
  background: url(4.jpg) no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

Create the  ken burns effect using keyframes.

@keyframes 
slideShow {  0% {
 opacity: 0;
 transform:scale(1);
 -ms-transform:scale(1);
}
 5% {
 opacity: 1
}
 25% {
 opacity: 1;
}
 30% {
 opacity: 0;
 transform:scale(1.1);
 -ms-transform:scale(1.1);
}
 100% {
 opacity: 0;
 transform:scale(1);
 -ms-transformm:scale(1);
}
}
@-o-keyframes 
slideShow {  0% {
 opacity: 0;
 -o-transform:scale(1);
}
 5% {
 opacity: 1
}
 25% {
 opacity: 1;
}
 30% {
 opacity: 0;
 -o-transform:scale(1.1);
}
 100% {
 opacity: 0;
 -o-transformm:scale(1);
}
}
@-moz-keyframes 
slideShow {  0% {
 opacity: 0;
 -moz-transform:scale(1);
}
 5% {
 opacity: 1
}
 25% {
 opacity: 1;
}
 30% {
 opacity: 0;
 -moz-transform:scale(1.1);
}
 100% {
 opacity: 0;
 -moz-transformm:scale(1);
}
}
@-webkit-keyframes 
slideShow {  0% {
 opacity: 0;
 -webkit-transform:scale(1);
}
 5% {
 opacity: 1
}
 25% {
 opacity: 1;
}
 30% {
 opacity: 0;
 -webkit-transform:scale(1.1);
}
 100% {
 opacity: 0;
 -webkit-transformm:scale(1);
}
}