CSS Image slider

HTML

<div id="slider">
    
    <!-- Sildes -->
    <img id="one" src="http://cssdeck.com/uploads/media/items/3/3yiC6Yq.jpg" />
    <img id="two" src="http://cssdeck.com/uploads/media/items/4/40Ly3VB.jpg" />
    <img id="three" src="http://cssdeck.com/uploads/media/items/0/00kih8g.jpg" />
    <img id="four" src="http://cssdeck.com/uploads/media/items/2/2rT2vdx.jpg" />
    <img id="five" src="http://cssdeck.com/uploads/media/items/8/8k3N3EL.jpg" />
    
    <!-- Links for the slides! -->
    <ul>
        <li>
            <a href="#one"></a>
        </li>
        <li>
            <a href="#two"></a>
        </li>
        <li>
            <a href="#three"></a>
        </li>
        <li>
            <a href="#four"></a>
        </li>
        <li>
            <a href="#five"></a>
        </li>
    </ul>
</div>

CSS

body {
  padding: 0;
  margin: 0;
  background: #ccc;
}

h1 {
  text-align: center;
    padding-top: 50px;
    font-size: 35px;
    font-family: "Segoe UI";
    font: 100 40px / 25px "Century Gothic";
    text-align: center;
    color: #666;
    text-shadow: 1px 1px 1px rgba(255, 255, 255, .5);
}

#slider {
  width: 640px;
  height: 320px;
  margin: 50px auto 0;
  position: relative;  
  background: #fff;
    
  box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.2); 
  -moz-box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.2);
  -webkit-box-shadow: 0px 0px 5px 0px rgba(0,0,0,0.2);
}

#slider:before, #slider:after {
    content: '';
    position: absolute;
    
    width: 60%;
    height: 20px;
    
    -webkit-box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    -moz-box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    -ms-box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    -o-box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    
    -webkit-transform: rotate(-4deg) skew(-10deg);
    -moz-transform: rotate(-4deg) skew(-10deg);
    -o-transform: rotate(-4deg) skew(-10deg);
    -ms-transform: rotate(-4deg) skew(-10deg);
    transform: rotate(-4deg) skew(-10deg);
    
    left: 10px;
    bottom: 13px;
    z-index: -1;
}

#slider:after {
    left: auto;
    right: 10px;
    
    -webkit-transform: rotate(4deg) skew(100deg);
    -moz-transform: rotate(4deg) skew(10deg);
    -o-transform: rotate(4deg) skew(10deg);
    -ms-transform: rotate(4deg) skew(10deg);
    transform: rotate(4deg) skew(10deg);
}

#slider ul {
  width: 140px;
  height: 40px;
  padding: 0 0 0 0;
  position: absolute;
  z-index: 10;
  list-style: none;
  
  left: 50%;
  margin-left: -70px;
  bottom: -60px;
}

#slider ul li:first-child {
  margin-left: 16px;
}

#slider ul li {
  float: left;
  margin-right: 12px;
  margin-top: 14px;
}

#slider ul li:last-child {
  margin-right: 0;
}

#slider ul li a {
  width: 12px;
  height: 12px;
  display: block;
  outline: none;
  border: none;
  position:...