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

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

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

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

.slider {
    background: white;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.125);
    height: 100px;
    margin: auto;
    overflow: hidden;
    position: relative;
    width: 100%;
}

    .slider::before, .slider::after {
        background: linear-gradient(to right, white 0%, rgba(255, 255, 255, 0) 100%);
        content: "";
        height: 100px;
        position: absolute;
        width: 200px;
        z-index: 2;
    }

    .slider::after {
        right: 0;
        top: 0;
        transform: rotateZ(180deg);
    }

    .slider::before {
        left: 0;
        top: 0;
    }

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

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