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HTML 

              
                <main class="scrollContainer">
  <section class="main-container-animation" id="stickytargetzzz">
    <div class="bg-image" style="background-image: url('https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/bg-paper-800px.jpg');"></div>
    <div class="bg-color"></div>
    <div class="scene-alt scene-0-alt">
      <h1>Die neuen <i>Dr.</i>BEST <span>GreenClean <span class="interdental">INTERDENTAL</span></span></h1>
      <div class="brushes">
        <div class="brush-small brush-1">
          <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/brush-small-1.png" />
        </div>
        <div class="size">
          <div class="size-inner">ISO-Größe 0&nbsp;<span>(0,4 mm)</span></div>
        </div>
        <div class="brush-small brush-2">
          <img class="brush-image" id="stickytarget" src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/brush-small-2.png" />
        </div>
        <div class="size">
          <div class="size-inner">ISO-Größe 2&nbsp;<span>(0,5 mm)</span></div>
        </div>
        <div class="brush-small brush-3">
          <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/brush-small-3.png" />
        </div>
        <div class="size">
          <div class="size-inner">ISO-Größe 3&nbsp;<span>(0,6 mm)</span></div>
        </div>
      </div>
    </div>
    <div class="scene-alt scene-vorteile-alt  scene-1-alt " id="scene-1-alt">
      <p class="vorteile-text">Bis zu 40% mehr Zahnoberfläche reinigen als mit Zähneputzen allein!</p>
      <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/Vorteil1.svg" class="vorteile-image" alt="vorteile-1">
    </div>
    <div class=" scene-alt scene-vorteile-alt  scene-2-alt " id="scene-2-alt">
      <p class="vorteile-text">Für eine gründliche Entfernung von Plaque und Essensresten.</p>
      <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/Vorteil2.svg" class="vorteile-image" alt="vorteile-2">
    </div>
    <div class=" scene-alt scene-vorteile-alt  scene-3-alt " id="scene-3-alt">
      <p class="vorteile-text">Sanfte Reinigung zwischen den Zähnen. Hilft bei regelmäßiger Anwendung
        Zahnfleischproblemen vorzubeugen.</p>
      <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/Vorteil2.svg" class="vorteile-image" alt="vorteile-2">
      <div class="kong-brush_start"></div>
    </div>
    <div class="scene-brush-alt" id="scene-brush-alt">
      <div class="brush-container-alt">
        <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/brush-big-with-shadow.png" class="bigbrush-image" alt="King Kong's brush">
      </div>
      <div class="cap-container-alt">
        <img src="https://dr-best-de.preprod-cf65.ch.adobecqms.net/content/dam/cf-consumer-healthcare/drbest/master/interdental/animation/brush-cap-with-shadow.png" class="cap-image" alt="">
      </div>

    </div>
    <div class=" scene-alt scene-details-alt  scene-4-alt " id="scene-4-alt">
      <h2 class="details-title">Softe Borsten aus nachwachsenden Rohstoffen</h2>
      <p class="details-text">Für eine sanfte Reinigung zwischen den Zähnen.</p>
    </div>
    <div class=" scene-alt scene-details-alt  scene-5-alt " id="scene-5-alt">
      <h2 class="details-title">Flexibler, beschichteter Draht</h2>
      <p class="details-text">Um auch die hinteren Zahnzwischenräume einfach zu erreichen</p>
    </div>
    <div class=" scene-alt scene-details-alt  scene-6-alt " id="scene-6-alt">
      <h2 class="details-title">Ergonomischer, pflanzenbasierter Griff</h2>
      <p class="details-text">aus nachwachsenden Rohstoffen und zudem ergonomisch, um eine einfache und angenehme Anwendung zu ermöglichen.</p>
      <div class="cap-brush-start"></div>
      <div class="kong-brush-end"></div>
    </div>
    <div class=" scene-alt scene-details-alt  scene-7-alt " id="scene-7-alt">
      <h2 class="details-title">Hygienische, umweltfreundliche Schutzkappe</h2>
      <p class="details-text">Ideal um unsere Bürsten immer & überall hygienisch verpackt dabei zu haben.</p>
      <div class="cap-brush-end"></div>
    </div>
  </section>

</main>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
  border: 0;
}
body {
  overflow-x: hidden;
  width: 100vw;
}
.appear {
  position: relative;
}

.img-wrap {
  display: flex;
  justify-content: center;
}

.norotate {
  position: relative;
  width: 30%;
  background-color: brown;
  color: beige;
  transition: 0.5s all ease-in-out;
}

.main-container-animation {
  color: #1b2148;
  position: relative;
  height: 100%;
}

.main-container-animation .bg-image {
  height: 100%;
  position: absolute;
  width: 100%;
}

.main-container-animation .bg-color {
  background-color: transparent;
  bottom: 0;
  left: 0;
  top: 0;
  position: absolute;
  right: 0;
  width: 100%;
  height: 100%;
}

.scene-alt {
  align-items: center;
  display: flex;
  height: 100vh;
  position: relative;
  z-index: 1;
}

.scene-alt.scene-0-alt h1 {
  font-family: Larsseit, sans-serif;
  font-size: 55px;
  line-height: 1;
  font-weight: 400;
  left: 10%;
  position: absolute;
  top: 18%;
  width: 490px;
}

.scene-alt.scene-0-alt .brushes {
  align-content: space-between;
  display: flex;
  left: 45px;
  margin: auto;
  position: relative;
  z-index: 1;
  line-height: 0 !important;
}

.scene-alt.scene-0-alt .brushes .brush-small .brush-image {
  height: 100%;
  width: auto;
  position: relative;
  z-index: 1;
}

.scene-alt.scene-0-alt .brushes .size {
  align-items: flex-end;
  display: flex;
  font-weight: 700;
  font-size: 16px;
  margin-left: 15px;
  margin-right: 20px;
  position: relative;
  white-space: nowrap;
  width: 25px;
  line-height: 0 !important;
}

.scene-alt.scene-0-alt .brushes .size .size-inner {
  position: absolute;
  transform: rotate(-90deg);
  transform-origin: left bottom;
}

.scene-alt.scene-0-alt .brushes .size span {
  font-weight: 400;
}

.scene-alt.scene-vorteile-alt,
.end-scene {
  justify-content: space-between;
  height: 100vh;
}

.scene-alt.scene-vorteile-alt .vorteile-text {
  font-family: Larsseit, sans-serif;
  font-size: 40px;
  line-height: 1;
  font-weight: 600;
  margin-left: 10%;
  width: 453px;
}

.scene-alt.scene-vorteile-alt .vorteile-image {
  margin-right: 8%;
  width: 25%;
  height: auto;
}

.scene-alt.scene-details-alt {
  flex-direction: column;
  align-items: flex-start !important;
  justify-content: flex-start;
}

.scene-alt.scene-details-alt .details-title {
  font-family: Larsseit, sans-serif;
  font-size: 60px;
  line-height: 1;
  font-weight: 600;
  margin-left: 10%;
  margin-top: 22vh;
  margin-bottom: 0;
  width: 38%;
}

.scene-alt.scene-details-alt .details-text {
  font-family: Larsseit, sans-serif;
  font-size: 22px;
  line-height: 1;
  font-weight: 400;
  margin-left: 10%;
  margin-top: 1rem;
  width: 30%;
}

.scene-brush-alt {
  box-sizing: border-box;
  bottom: 0;
  height: 100vh;
  max-width: 1920px;
  overflow: hidden;
  pointer-events: none;
  position: absolute;
  width: 100%;
  z-index: 5;
}

.scene-brush-alt.stick {
  position: fixed;
  background:red;
}

.scene-brush-alt.under {
  z-index: 2;
}

.scene-brush-alt .brush-container-alt,
.scene-brush-alt .cap-container-alt {
  height: 100%;
  position: absolute;
  right: 0;
  top: 0;
  transform: scaleY(-1);
}

/* @media (max-width: 991px) {
  .scene-brush-alt .brush-container-alt {
    height: 180%;
  }
}

@media (max-width: 767px) {
  .scene-brush-alt .brush-container-alt {
    height: 150%;
  }
}
 */
.scene-brush-alt .brush-container-alt .bigbrush-image,
.scene-brush-alt .cap-container-alt .cap-image {
  height: 150%;
  width: auto;
  transform: translateX(90%);
}

/* .scene-brush-alt .brush-container-alt .cap-container-alt {
  top: -113%;
  height: auto;
  left: 0;
  position: absolute;
  visibility: hidden;
  width: 93%;
} */

.scene-brush-alt .brush-container-alt .cap-container-alt .cap-image {
  width: 100%;
  height: auto;
  transform: translateX(-50%);
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger);

const BGcolor = document.querySelector(".bg-color");
const tl = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-1-alt",
    endTrigger: ".scene-3-alt",
    pin: false,
    anticipatePin: 1,
    scrub: 1,
    end: "bottom"
  }
});
tl.to(
  BGcolor,
  {
    duration: 1,
    backgroundColor: "#e268a0",
    ease: "none"
  },
  0
)
  .to(
    BGcolor,
    {
      duration: 1.5,
      backgroundColor: "#e95868",
      ease: "none"
    },
    1
  )
  .to(
    BGcolor,
    {
      duration: 1.5,
      backgroundColor: "#7ecbdb",
      ease: "none"
    },
    2
  );

gsap.to(".brush-2", {
  scrollTrigger: {
    pin: true,
    anticipatePin: 1,
    scrub: 1,
    markers: true,
    trigger: ".brush-2",
    start: "top-=70px",
    endTrigger: ".scene-4-alt",
    end: "center+=800px",
    invalidateOnRefresh: true
  }
});
// var brush = gsap.timeline({
//     scrollTrigger: {
//         trigger: ".brush-2",
//         endTrigger: ".scene-4-alt ",
//         pin: true,
//         anticipatePin: 1,
//         scrub: true,
//         start: 'top-=70px',
//         end: "bottom",
//         markers: true,
//         id: "pin",

//     }
// });

var scene1 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-1-alt",
    pin: true,
    anticipatePin: 1,
    scrub: 0,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});
var scene2 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-2-alt",
    pin: true,
    anticipatePin: 1,
    scrub: true,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});
var scene3 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-3-alt",
    pin: true,
    anticipatePin: 1,
    scrub: 1,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});
var scene4 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-4-alt",
    pin: true,
    anticipatePin: 1,
    scrub: 0.2,
    start: "top",
    end: "bottom ",
    invalidateOnRefresh: true
  }
});
var scene5 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-5-alt",
    pin: true,
    anticipatePin: 1,
    scrub: 0.2,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});
var scene6 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-6-alt",
    pin: true,
    anticipatePin: 1,
    scrub: 0.2,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});
var scene7 = gsap.timeline({
  scrollTrigger: {
    trigger: ".scene-7-alt",
    pin: true,
    anticipatePin: 0,
    scrub: 0.2,
    start: "top",
    end: "bottom",
    invalidateOnRefresh: true
  }
});

gsap.set(".bigbrush-image", {
  xPercent: 50
});

var rotate = gsap
  .timeline({
    scrollTrigger: {
      trigger: ".kong-brush_start",
      endTrigger: ".kong-brush-end",
      pin: true,
      scrub: 0.2,
      start: "top top",
      end: "top"
    }
  })
  .to(".bigbrush-image", {
    x: -500,
    scale: 0.7,
    duration: 0.2
  })
  .to(
    ".bigbrush-image",
    {
      rotation: -180,
      duration: 0.3,
      scale: 0.45,
      transformOrigin: "50% 35%"
      // ease: "power3.inOut"
    },
    "<"
  );

gsap.set(".cap-image", {
  xPercent: 50
});

var rotate = gsap
  .timeline({
    scrollTrigger: {
      trigger: ".cap-brush-start",
      endTrigger: ".cap-brush-end",
      pin: true,
      scrub: 0.2,
      start: "top top",
      end: "top"
    }
  })
  .to(".cap-image", {
    rotation: -180,
    x: -500,
    y: 1500,
    scale: 0.4,
    duration: 0
  })
  .to(
    ".cap-image",
    {
      y: 0,
      duration: 0.3,
      scale: 0.25,
      transformOrigin: "50% 47%"
      // ease: "power3.inOut"
    },
    "<"
  );

let fixed = gsap.timeline({
  scrollTrigger: {
    toggleClass: "stick",
    trigger: "#scene-brush-alt",
    endTrigger: "#scene-7-alt",
    start: "top bottom",
    end: "bottom+=50"
  }
});
!
999px

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