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HTML 

              
                <div class="b-slider marquee-slider">
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/Forbes.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/Nat_Geo.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/Red_Cross.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/Discovery_Channel.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/REI.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
    <div class="b-slider__slide">
        <a href="#" class="b-slider__ref">
            <picture class="b-slider__picture">
                <img src="https://cdn.shopify.com/s/files/1/0789/1333/files/Fortune.svg?v=1593719066" class="b-slider__img">
            </picture>
        </a>
    </div>
</div>
!

CSS 

              
                body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100vh;
}

.b-slider {
  background-color: #f7f7f7;
  overflow-x: hidden;
  min-width: 100%;
  outline: 0;
  &:hover {
    .b-slider__img {
      filter: grayscale(1) contrast(0) blur(1px);  
    }
  }
  &__slide {
    text-align: center;
    width: 30rem;
    height: 8rem;
    display: flex;
    align-items: center;
  }
  &__ref {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    &:hover .b-slider__img {
      filter: unset;
    }
  }
}

@media screen and (max-width: 767px) {
  .b-slider {
    &__slide {
      text-align: center;
      width: 20rem;
      height: 8rem;
      display: flex;
      align-items: center;
    }
  }
}

@media screen and (max-width: 556px) {
  .b-slider {
    &__slide {
      text-align: center;
      width: 15rem;
      height: 8rem;
      display: flex;
      align-items: center;
    }
  }
}
!

JS 

              
                let marqueeSlider = document.querySelector('.marquee-slider');
let marqueeSlide = document.querySelector('.b-slider__ref');
let mainTicker = new Flickity('.marquee-slider', {
  accessibility: true,
  resize: true,
  wrapAround: true,
  prevNextButtons: false,
  pageDots: false,
  percentPosition: true,
  setGallerySize: true,
});

// Set initial position to be 0
mainTicker.x = 0;

// Start the marquee animation
play();

// Main function that 'plays' the marquee.
function play() {
  // Set the decrement of position x
  mainTicker.x -= 1.5;

  // Settle position into the slider
  mainTicker.settle(mainTicker.x);

  // Set the requestId to the local variable
  requestId = window.requestAnimationFrame(play);
}

// Main function to cancel the animation.
function pause() {
  if(requestId) {
    // Cancel the animation
    window.cancelAnimationFrame(requestId)

    // Reset the requestId for the next animation.
    requestId = undefined;
  }
}

// Pause on hover/focus
marqueeSlider.addEventListener('mouseenter', () => pause());

// Unpause on mouse out / defocus
marqueeSlider.addEventListener('mouseleave', () => play());
!
999px

Console