div#slider {
    width: 80%;
    max-width: 1000px;
    margin: auto auto;
}

div#slider figure {
    position: relative;
    width: 500%;
    margin: 0;
    padding: 0;
    font-size: 0;
    text-align: left;
}

div#slider figure img {
    width: 25%;
    height: auto;
    float: left;
}

div#slider {
    width: 80%;
    max-width: 1000px;
    overflow: hidden
}

@keyframes slidy {
    0% {
        left: 0%;
    }

    15% {
        left: 0%;
    }

    20% {
        left: -100%;
    }

    35% {
        left: -100%;
    }

    40% {
        left: -200%;
    }

    55% {
        left: -200%;
    }

    60% {
        left: -300%;
    }

    75% {
        left: -300%;
    }

    80% {
        left: -400%;
    }
    95%{
        left: -400%;
    }
    
    100%{
        left: -500%;
    }
    115%{
        left: -500%;
    }
   
}

div#slider figure {
    position: relative;
    width: 500%;
    margin: 0;
    padding: 0;
    font-size: 0;
    left: 0;
    text-align: left;
    animation: 25s slidy infinite;
}