<div class="diy-slideshow">
	<figure class="show">
		<img src="http://themarklee.com/wp-content/uploads/2013/12/snowying.jpg" width="100%" /><figcaption>"Snowying" by <a href="http://www.flickr.com/photos/fiddleoak/8511209344/">fiddleoak</a>.</figcaption> 
	</figure>
  <figure>
    <img src="http://themarklee.com/wp-content/uploads/2013/12/starlight.jpg" width="100%" /><figcaption>"Starlight" by <a href="http://www.flickr.com/photos/chaoticmind75/10738494123/in/set-72157626146319517">ChaoticMind75</a>.</figcaption> 
	</figure>
	<figure>
		<img src="http://themarklee.com/wp-content/uploads/2013/12/snowstorm.jpg" width="100%" /><figcaption>"Snowstorm" by <a href="http://www.flickr.com/photos/tylerbeaulawrence/8539457508/">Beaulawrence</a>.</figcaption> 
	</figure>
  <figure>
		<img src="http://themarklee.com/wp-content/uploads/2013/12/misty-winter-afternoon.jpg" width="100%" /><figcaption>"Misty winter afternoon" by <a href="http://www.flickr.com/photos/22746515@N02/5277611659/">Bert Kaufmann</a>.</figcaption> 
	</figure>
  <figure>
		<img src="http://themarklee.com/wp-content/uploads/2013/12/good-morning.jpg" width="100%" /><figcaption>"Good Morning!" by <a href="http://www.flickr.com/photos/frank_wuestefeld/4306107546/">Frank Wuestefeld</a>.</figcaption> 
	</figure>
  <figure>
		<img src="http://themarklee.com/wp-content/uploads/2013/12/driving-home-for-christmas.jpg" width="100%" /><figcaption>"Driving home for Christmas" by <a href="http://www.flickr.com/photos/22746515@N02/5292186041/">Bert Kaufmann</a>.</figcaption> 
	</figure>
  <span class="prev">&laquo;</span>
  <span class="next">&raquo;</span>
</div>  

<p>An example of a pretty basic diy slideshow. This is the no-jQuery version.</p>
body {
  margin: 0; 
  padding: 0;
  background: #111;
  height: 100%;
}
.diy-slideshow{
  position: relative;
  display: block;
  overflow: hidden;
}
figure{
  position: absolute;
  opacity: 0;
  transition: 1s opacity;
}
figcaption{
  position: absolute;
  font-family: sans-serif;
  font-size: .8em;
  bottom: .75em;
  right: .35em;
  padding: .25em;
  color: #fff;
  background: rgba(0,0,0, .25);
  border-radius: 2px;
}
figcaption a{
  color: #fff;
}
figure.show{
  opacity: 1;
  position: static;
  transition: 1s opacity;
}
.next, .prev{
  color: #fff;
  position: absolute;
  background: rgba(0,0,0, .6);
  top: 50%;
  z-index: 1;
  font-size: 2em;
  margin-top: -.75em;
  opacity: .3;
  user-select: none;
}
.next:hover, .prev:hover{
  cursor: pointer;
  opacity: 1;
}
.next{
  right: 0;
  padding: 10px 5px 15px 10px;
  border-top-left-radius: 3px;
  border-bottom-left-radius: 3px;
}
.prev{
  left: 0;
  padding: 10px 10px 15px 5px;
  border-top-right-radius: 3px;
  border-bottom-right-radius: 3px;
}
p{
  margin: 10px 20px;
  color: #fff;
}
(function(){
  
var counter = 0, // to keep track of current slide
    $items = document.querySelectorAll('.diy-slideshow figure'), // a collection of all of the slides, caching for performance
    numItems = $items.length; // total number of slides

// this function is what cycles the slides, showing the next or previous slide and hiding all the others
var showCurrent = function(){
  var itemToShow = Math.abs(counter%numItems);// uses remainder (aka modulo) operator to get the actual index of the element to show  
  
  // remove .show from whichever element currently has it 
  // http://stackoverflow.com/a/16053538/2006057
  [].forEach.call( $items, function(el){
    el.classList.remove('show');
  });
  
  // add .show to the one item that's supposed to have it
  $items[itemToShow].classList.add('show');    
};

// add click events to prev & next buttons 
document.querySelector('.next').addEventListener('click', function() {
     counter++;
     showCurrent();
  }, false);

document.querySelector('.prev').addEventListener('click', function() {
     counter--;
     showCurrent();
  }, false);
  
})();  

External CSS

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External JavaScript

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