@keyframes marqueeAnimation {
    0% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(-100%);
    }
}
.marquee-wrap{
    display: flex;
    background: #000;
    height: 50px;
    line-height: 50px;
    color: #fff;
    overflow: hidden;
}
.marquee-content{
    width: 100%;
    animation: marqueeAnimation 5s linear 0s infinite;
    overflow: hidden;
}

<section class="marquee-wrap">
    <section class="marquee-content">
        3232323323232332323233232323323232332323233232323323232332323233232323-----
    </section>
</section>

<script>
    let marqueeContent = document.getElementsByClassName('marquee-content')[0];
    marqueeContent.style.animationDuration =  3 * 0.2 + 10 + 's';
</script>