.slider {
	width: 1070px;
	margin: auto;
	overflow: hidden;
                   background-color: #92a8d1;
            
}

.slider ul {
	display: flex;
	padding: 0;
	width: 1070px;	
	animation: cambio 20s infinite alternate linear;
}

.slider li {
                   height: 305px;
	list-style: none;
}

.slider img {
                   height: 305px;
}

@keyframes cambio {
	0% {margin-left: 0;}
	15% {margin-left: 0;}	
	30% {margin-left: -100%;}
	45% {margin-left: -100%;}	
	60% {margin-left: -200%;}
	75% {margin-left: -200%;}	
	90% {margin-left: -300%;}
	100% {margin-left: -300%;}
}