PASO 1
Index.html
<html>
<head>
<title> slider </title>
<link rel="stylesheet" href="slider.css">
</ head>
<body>
<div class= "slider">
<ul>
<li><img src="img1.jpg"></li>
<li><img src="img2.jpg"></li>
<li><img src="img3.jpg"></li>
<li><img src="img4.jpg"></li>
</ul>
</div>
</body>
</html>
SEGUNDO PASO
ANIMACIÒN CSS
Slider.html
SLIDE
//html
<link rel="stylesheet" href="slider.css">
<div class="slider">
<ul>
<li>
<img src="http://dominicushoeve.com/wp-content/uploads/ktz/latest-high-resolution-wallpaper-1920x1080-70558-pictures-high-resolution-wallpaper-30whtvl34j4r12m8b0c1sa.jpg" alt="">
</li>
<li>
<img src="http://youghaltennisclub.ie/wp-content/uploads/2014/06/Tennis-Wallpaper-High-Definition-700x300.jpg" alt="">
</li>
<li>
<img src="http://welltechnically.com/wp-content/uploads/2013/08/android-wallpapers-700x300.jpg" alt="">
</li>
<li>
<img src="http://welltechnically.com/wp-content/uploads/2013/09/android-widescreen-wallpaper-14165-hd-wallpapers-700x300.jpg" alt="">
</li>
</ul>
</div>
//css
.slider{
width: 95%;
margin: auto;
overflow: hidden;
}
.slider ul {
display: flex;
padding: 0;
width: 400%;
animation: cambio 20s infinite alternate linear;
}
.slider li {
width: 100%;
list-style: none;
}
.slider img {
width:1200px;
height: 350px;
}
@keyframes cambio {
0% {margin-left: 0;}
20% {margin-left: 0;}
25% {margin-left: -200%;}
45% {margin-left: -200%;}
50% {margin-left: -200%;}
70% {margin-left: -200%;}
75% {margin-left: -300%;}
100% {margin-left: -300%;}
}