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HTML 

              
                <section class="container one"></section>
    <section class="container two"></section>
    <section class="container three"></section>
    <section id="main" class="container four">
      <div class="content">
        <h2>Measurement that drives business outcomes</h2>

        <div class="slider">
          <div class="slider-nav">
            <a href="#slide-1" class="nav-item"></a>
            <a href="#slide-2" class="nav-item"></a>
            <a href="#slide-3" class="nav-item"></a>
            <div class="nav-arrow"></div>
          </div>
          <div class="slider-wrap">
            <div class="slider-items">
              <div class="item-slider" id="slide-1">
                <h3>
                  Tying campaings to real-time sales data provides proof of
                  efficient, effective spending and key insights for future
                  planning
                </h3>
              </div>
              <div class="item-slider" id="slide-2">
                <h3>
                  Spend your campaing dollars that are directly tied to sales
                  and optimize along the way
                </h3>
              </div>
              <div class="item-slider" id="slide-3">
                <h3>
                  Tying campaings to real-time sales data provides proof of
                  efficient, effective spending and key insights for future
                  planning
                </h3>
              </div>
            </div>
          </div>
        </div>
      </div>
    </section>
    <div class="container five"></div>
    <div class="container six"></div>
!

CSS 

              
                * {
  box-sizing: border-box;
}

.container {
  width: 100%;
  height: auto;
  padding: 40px;
  position: relative;
  box-sizing: border-box;
}

#main {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 80vh;
  width: 80vh;
}

h2 {
  text-align: center;
  max-width: 300px;
  margin: 0 auto 40px;
}

.one {
  height: 300px;
  background-color: aqua;
}

.two {
  height: 200px;
  background-color: blue;
}

.three {
  height: 100px;
  background-color: red;
}

.four {
  background-color: skyblue;
  /* padding-left: 0;
  padding-right: 0;
  padding-bottom: 0; */
  overflow: hidden;
  /* height: 600px; */
}

.five {
  height: 200px;
  background-color: yellow;
}

.six {
  height: 100px;
  background-color: purple;
}

.slider {
  width: 100%;
  height: 100%;
  position: relative;
  max-height: 380px;
  max-width: 820px;
  /* border-radius: 60px; */
}
.slider-wrap {
  overflow: hidden;
  height: 100%;
}
.slider-items {
  margin: 0 auto;
  /* width: 500%; */
  height: 100%;

  position: relative;
  /* overflow: hidden; */
  border-radius: 60px;
  display: flex;

  flex-wrap: nowrap;
}

.item-slider {
  /* position: absolute; */
  display: flex;
  flex: 1 0 100%;
  padding: 20px;
  height: 100%;
  width: 100%;
  /* margin: 0 auto; */
  background-color: blue;
}

h3 {
  color: wheat;
}

/* .item-slider:nth-child(2) {
  background-color: brown;
}

.item-slider:nth-child(3) {
  background-color: orange;
} */

.slider-nav {
  position: absolute;
  width: 100%;
  bottom: 40px;
  z-index: 1;
  gap: 10px;
  display: flex;

  justify-content: center;
}

.nav-item {
  width: 8px;
  height: 8px;
  border: 1px solid white;
  border-radius: 50%;
  background-color: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  display: block;
}

.nav-item.active {
  background-color: white;
}

.nav-arrow {
  width: 16px;
  height: 8px;
  background-color: #fff;
}

@media screen and (min-width: 768px) {
  .slider-nav {
    flex-direction: column;
    align-items: center;
    bottom: auto;
    right: -40px;
    width: auto;
    height: 100%;
  }

  .slider-items {
    flex-direction: column;
  }

  /* .item-slider {
    position: absolute;
  } */

  .nav-arrow {
    transform: rotate(90deg);
  }
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger);

let mm = gsap.matchMedia();
let mainSection = document.querySelector("#main");
let items = gsap.utils.toArray(".item-slider");

let nav = document.querySelector(".slider-nav");
let dots = gsap.utils.toArray(".nav-item");

let tl = gsap.timeline({
  scrollTrigger: {
    trigger: mainSection,
    start: "center center",
    pin: true,
    scrub: 2,
    end: "+=" + innerHeight,
    markers: true,
  },
});

// Mobile
mm.add("(max-width: 767px)", () => {
  let scrollTween = gsap.to(items, {
    xPercent: -100 * (items.length - 1),
    ease: "none",
    scrollTrigger: {
      trigger: ".slider-wrap",
      start: "top top",
      scrub: 0.1,
      end: "+=6000",
      // markers: true,
    },
  });

  items.forEach((item, i) => {
    ScrollTrigger.create({
      trigger: item,
      containerAnimation: scrollTween,
      start: "top top",
      end: i === items.length - 1 ? "right right" : "right 30%",
      onToggle: (self) => {
        console.log("first");
        gsap.to(dots[i], {
          background: self.isActive ? "white" : "transparent",
        });
      },
      // markers: true,
    });
  });
});

// Desktop
mm.add("(min-width: 768px)", () => {
  console.log(dots);

  items.forEach((item, i) => {
    ScrollTrigger.create({
      trigger: item,
      start: "top center",
      // animation: tl,
      markers: {
        startColor: "blue",
        endColor: "yellow",
        fontSize: "18px",
        fontWeight: "bold",
        indent: 20,
      },
      scrub: 1,

      end: "bottom center",
      onEnter: () => {
        console.log("enter", i);
        // lt.to(dots[i], {
        //   background: self.isActive ? "white" : "transparent",
        // });
      },

      onToggle: (self) => {
        console.log(self);
        gsap.to(dots[i], {
          background: self.isActive ? "white" : "transparent",
        });
      },
      onLeave: () => {
        gsap.to(dots[i], {
          background: "transparent",
        });
      },
    });
  });
});
!
999px

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