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HTML 

              
                <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>sample</title>
  <link rel="stylesheet" href="styles.css">
  <link href="https://fonts.googleapis.com/css2?family=Caveat&display=swap" rel="stylesheet">
</head>
<body>
  <div class="loading-container" id="loading-container">
    <img src="src/topleftcl.png" alt="Cloud 1" class="cloud top-left">
    <img src="src/toprightcl.png" alt="Cloud 2" class="cloud top-right">
    <img src="src/btmlftcl.png" alt="Cloud 3" class="cloud bottom-left">
    <img src="src/btmrightcl.png" alt="Cloud 4" class="cloud bottom-right">
  </div>
  <div class="main-container" id="container" style="display: none;">
    <div class="left-container">
      <div class="image-wrapper">
        <picture>
          <source id="animation-frame-webp" type="image/webp">
          <img id="animation-frame" alt="Animation Frame" loading="lazy">
        </picture>
        <div class="watermark">Sea</div>
        <div class="overlay"></div>
      </div>
    </div>
    <div class="right-container">
      <img src="src/title.png" alt="Title Image" class="title-image">
      <img src="src/sub.png" alt="Sub Image" class="sub-image">
      <div class="sub-text">
        <p>“SEA</p>
       
        <p>This creative endeavor sets the stage for a world rich in collectibles, toys, animations, and storytelling.</p>
      </div>
      <img src="src/banner.png" alt="Banner Image" class="banner-image">
    </div>
  </div>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/gsap.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/ScrollTrigger.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/ScrollToPlugin.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bodymovin/5.7.4/lottie.min.js"></script>
  <script src="src/animation.js"></script>
  <script src="src/index.js"></script>
</body>
</html>
!

CSS 

              
                body, html {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-family: Arial, sans-serif;
    height: 200%;
    background-color: #010cae;
    scroll-behavior: smooth;
  }
  
  .loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #010cae;
    z-index: 10;
  }
  
  .cloud {
    position: absolute;
    width: 110%;
    transition: transform 30s ease-out;
  }
  
  .top-left {
    top: 0;
    left: 0;
  }
  
  .top-right {
    top: 0;
    right: 0;
  }
  
  .bottom-left {
    bottom: 0;
    left: 0;
  }
  
  .bottom-right {
    bottom: 0;
    right: 0;
  }
  
  .main-container {
    display: flex;
    width: 100%;
    height: 100vh;
    padding: 20px;
    position: relative;
  }
  
  .left-container, .right-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  
  .image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 20;
  }
  
  .image-wrapper img,
  .image-wrapper source {
    display: block;
    max-width: 650px;
    height: auto;
    object-fit: contain;
    pointer-events: none;
    -webkit-user-drag: none;
  }
  
  .image-wrapper .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    pointer-events: none;
  }
  
  .image-wrapper .watermark {
    display: none;
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: 24px;
    color: rgba(255, 255, 255, 0.5);
    pointer-events: none;
  }
  
  .title-image,
  .sub-image,
  .sub-text,
  .banner-image {
    position: fixed;
    width: 60%;
    margin-left: -20%;
    top: 200%;
  }
  
  .title-image {
    top: 110%;
    margin-bottom: 5px;
    z-index: 10;
  }
  
  .sub-image {
    top: 120%;
    margin-bottom: 5px;
    z-index: 10;
  }
  
  .sub-text {
    top: 130%;
    max-width: 40%;
    color: rgb(222, 234, 255);
    text-align: justify;
    font-size: 24px;
    font-family: 'Caveat', cursive;
    margin-bottom: 10px;
    z-index: 10;
  }
  
  .banner-image {
    top: 140%;
    max-width: 43%;
    margin-bottom: 10px;
    z-index: 10;
  }
  
  @media (max-width: 768px) {
    .main-container {
      flex-direction: column;
    }
    .left-container, .right-container {
      height: 50vh;
    }
    .image-wrapper img,
    .image-wrapper source,
    .title-image,
    .sub-image,
    .sub-text,
    .banner-image {
      width: 90%;
      left: 5%;
    }
  }
  
  @media (max-width: 480px) {
    .main-container {
      flex-direction: column;
    }
    .left-container, .right-container {
      height: 50vh;
    }
    .image-wrapper img,
    .image-wrapper source,
    .title-image,
    .sub-image,
    .sub-text,
    .banner-image {
      width: 100%;
      left: 0;
    }
  }
!

JS 

              
                document.addEventListener("DOMContentLoaded", () => {
    // Scroll to the top of the page when it loads or refreshes
    window.scrollTo(0, 0);
  
    const frameCount = 150; // Number of images in the sequence
    const initialFrames = 75; // Number of initial frames to preload
    const images = [];
    const imageElement = document.getElementById("animation-frame");
    const imageElementWebP = document.getElementById("animation-frame-webp");
    const loadingContainer = document.getElementById("loading-container");
    const container = document.getElementById("container");
    const titleImage = document.querySelector(".title-image");
    const subImage = document.querySelector(".sub-image");
    const subText = document.querySelector(".sub-text");
    const bannerImage = document.querySelector(".banner-image");
    let initialFramesLoaded = false;
  
    // Preload images
    const preloadImages = () => {
      let loadedImages = 0;
  
      for (let i = 301; i <= 450; i++) {
        const imgWebP = new Image();
        imgWebP.src = `src/optimized/SBS_Play_Skateboard_${i.toString().padStart(4, '0')}.webp`;
        imgWebP.loading = i <= 301 + initialFrames - 1 ? 'eager' : 'lazy';
        imgWebP.onload = () => {
          loadedImages++;
          if (loadedImages === initialFrames && !initialFramesLoaded) {
            // Initial frames are loaded
            initialFramesLoaded = true;
            gsap.to(clouds, { opacity: 0, duration: 1 });
          }
        };
        imgWebP.onerror = () => {
          console.error(`Failed to load image ${imgWebP.src}`);
          loadedImages++;
          if (loadedImages === initialFrames && !initialFramesLoaded) {
            initialFramesLoaded = true;
            gsap.to(clouds, { opacity: 0, duration: 1 });
          }
        };
        images.push(imgWebP);
      }
    };
  
    // Ensure the loading animation is visible before starting to preload images
    loadingContainer.style.display = 'flex';
    container.style.display = 'none';
    preloadImages();
  
    const initAnimation = () => {
      gsap.registerPlugin(ScrollTrigger, ScrollToPlugin);
  
      const updateAnimation = (progress) => {
        const frameIndex = Math.floor(progress * (frameCount - 1));
        imageElement.src = images[frameIndex].src;
        imageElementWebP.srcset = images[frameIndex].src;
      };
  
      const totalScrollDistance = document.body.scrollHeight - window.innerHeight;
  
      gsap.to({}, {
        scrollTrigger: {
          trigger: ".main-container",
          start: "top top",
          end: `+=${totalScrollDistance}`,
          scrub: 1.5, // Set scrub to a higher value for smoother and more controlled scroll
          pin: true,
          anticipatePin: 1,
          snap: {
            snapTo: 1 / frameCount, // Snap to the closest frame
            duration: { min: 0.2, max: 0.5 }, // Adjust the snapping speed
            ease: "power3.inOut" // Ease for snapping
          },
          onUpdate: self => {
            const progress = self.progress;
            requestAnimationFrame(() => updateAnimation(progress));
          }
        }
      });
  
      gsap.to(titleImage, {
        y: "-250vh", // Move title image up out of the viewport
        ease: "none",
        scrollTrigger: {
          trigger: ".main-container",
          start: "top top+=100", // Start slightly after the user begins scrolling
          end: `+=${totalScrollDistance / 1}`,
          scrub: true
        }
      });
  
      gsap.to(subImage, {
        y: "-250vh", // Move sub image up out of the viewport
        ease: "none",
        scrollTrigger: {
          trigger: ".main-container",
          start: "top top+=100", // Start slightly after the user begins scrolling
          end: `+=${totalScrollDistance / 1}`,
          scrub: true
        }
      });
  
      gsap.to(subText, {
        y: "-250vh", // Move sub text up out of the viewport
        ease: "none",
        scrollTrigger: {
          trigger: ".main-container",
          start: "top top+=100", // Start slightly after the user begins scrolling
          end: `+=${totalScrollDistance / 1}`,
          scrub: true
        }
      });
  
      gsap.to(bannerImage, {
        y: "-250vh", // Move banner image up out of the viewport
        ease: "none",
        scrollTrigger: {
          trigger: ".main-container",
          start: "top top+=100", // Start slightly after the user begins scrolling
          end: `+=${totalScrollDistance / 1}`,
          scrub: true
        }
      });
    };
  
    // Animate clouds on scroll
    gsap.registerPlugin(ScrollTrigger);
  
    const cloudAnimation = gsap.timeline({
      scrollTrigger: {
        trigger: ".loading-container",
        start: "top top",
        end: "bottom top",
        scrub: true,
        onUpdate: self => {
          if (initialFramesLoaded) {
            gsap.to(".cloud", { autoAlpha: 0, ease: "power1.inOut" });
          }
        },
        onEnter: () => {
          loadingContainer.style.display = 'none';
          container.style.display = 'flex';
          initAnimation();
        }
      }
    });
  
    cloudAnimation
      .to(".top-left", { duration: 15, x: "-50%", y: "-50%", scale: 2, ease: "power3.inOut" })
      .to(".top-right", { duration: 15, x: "50%", y: "-50%", scale: 2, ease: "power3.inOut" }, 0)
      .to(".bottom-left", { duration: 15, x: "-50%", y: "50%", scale: 2, ease: "power3.inOut" }, 0)
      .to(".bottom-right", { duration: 15, x: "50%", y: "50%", scale: 2, ease: "power3.inOut" }, 0)
      .to(".top-left", { duration: 15, x: "-100%", y: "-100%", scale: 4, ease: "power3.inOut" })
      .to(".top-right", { duration: 15, x: "100%", y: "-100%", scale: 4, ease: "power3.inOut" }, 15)
      .to(".bottom-left", { duration: 15, x: "-100%", y: "100%", scale: 4, ease: "power3.inOut" }, 15)
      .to(".bottom-right", { duration: 15, x: "100%", y: "100%", scale: 4, ease: "power3.inOut" }, 15)
      .to(".top-left", { duration: 15, x: "-150%", y: "-150%", scale: 6, ease: "power3.inOut" })
      .to(".top-right", { duration: 15, x: "150%", y: "-150%", scale: 6, ease: "power3.inOut" }, 30)
      .to(".bottom-left", { duration: 15, x: "-150%", y: "150%", scale: 6, ease: "power3.inOut" }, 30)
      .to(".bottom-right", { duration: 15, x: "150%", y: "150%", scale: 6, ease: "power3.inOut" }, 30);
  });
  
  // Ensure scroll position is reset to the top before the page unloads (refresh or navigate away)
  window.addEventListener("beforeunload", () => {
    window.scrollTo(0, 0);
  });
!
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