@import "https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" ;
.slider {
    overflow: hidden;
}
.slider figure {
    position: relative;
    width: 500%;
    margin: 0;
    left: 0;
    animation: 20s slider infinite;
}
.slider figure img {
    float: left;
    width: 20%;
}
@keyframes slider {
    0% {
        left: 0;
    }
    20% {
        left: 0;
    }
    25% {
        left: -100%;
    }
    45% {
        left: -100%;
    }
    50% {
        left: -200%;
    }
    70% {
        left: -200%;
    }
    75% {
        left: -300%;
    }
    95% {
        left: -300%;
    }
    100% {
        left: -400%;
    }
}