Este código lo pegas dentro de la etiqueta Body

gistfile1.html

<div id="wrappera">
 <div id="slider">
  <div class="inslider">
    <!-- Content holder will hold content -->
    <div class="contentholder">
     <div class="contentslider">
 
      <div class="contenta">
        <h1>Welcome to Content Slider Demo</h1>
        <p>Lorem Ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum </p>
      </div>
      <div class="contenta">
        <h1>Welcome to Content Slider Demo 2</h1>
        <p>Lorem Ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum </p>
      </div>
      <div class="contenta">
         <h1>Welcome to Content Slider Demo 3</h1>
        <p>Lorem Ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum </p>
      </div>
      <div class="contenta">
        <h1>Welcome to Content Slider Demo 4</h1>
        <p>Lorem Ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum </p>
      </div>        
   </div>
   </div>
 
<!-- Navigation for content slider -->
      <div class="contentnav">
          <a rel="1" href="#">1</a>
          <a rel="2" href="#">2</a>
          <a rel="3" href="#">3</a>
          <a rel="4" href="#">4</a>
      </div>
    </div>
   </div>
 </div>
</div>

gistfile2.js

$(document).ready(function() {
//Activate First Link
$(".contentnav a:first").addClass("active");
//width of a single content area
var contentwidth = $(".contentholder").width();
//Total number of content
var totalcontent = $(".contenta").size();
//Total width of all content area
var allcontentwidth = contentwidth * totalcontent;
//contentslider to new size which we got in above step
$(".contentslider").css({'width' : allcontentwidth});
//Now right a new function for slide and slide navigation
rotate = function(){
//Number of times we need to slide
var slideid = $active.attr("rel") - 1;
//Set the distance which single content needs to slide
var slidedistance = slideid * contentwidth;
//Remove active class
$(".contentnav a").removeClass('active');
//Add Active Class
$active.addClass('active');
//Slider Animation
$(".contentslider").animate({
        left: -slidedistance
    }, 500 );
}; 
 
//Set Time for Rotation of slide
rotation = function(){
play = setInterval(function(){
//Next slide nav
$active = $('.contentnav a.active').next();
if ( $active.length === 0) {
//Move to first slide nav
$active = $('.contentnav a:first');
}
rotate();
//Timer speed 5 sec
}, 5000);
};
//Run rotation fuction
rotation();
$(".contentnav a").click(function() {
$active = $(this);
clearInterval(play);
rotate();
rotation();
return false;
});
});