@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-250px * 7));
    }
}

.slider {
    height: 100px;
    margin: auto;
    overflow: hidden;
    position: relative;
    width: calc(100% - 10px);
    display: block;
}

.slider .slide-track {
    animation: scroll 40s linear infinite;
    display: flex;
    width: calc(250px * 14);
}

.slider .slide {
    height: 100px;
    width: 250px;
    padding: 10px;
}