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HTML

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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <!-- fake body -->

<body class="overflow-x-hidden font-semibold text-white text-5xl" style="font-family:'Open Sans';">
  <!-- fake body -->
  <!-- start sections // -->
  <section class="bg-red-600 min-h-screen flex items-center justify-center">A</section>
  <section class="bg-blue-600 min-h-screen flex items-center justify-center">B</section>
  <!-- horizonal scrolling section / -->
  <section class="bg-yellow-600 min-h-screen w-[500%] flex flex-no-wrap st--horizontal">
    <!-- section w up and down elements -->
    <div class="w-screen bg-purple-900 min-h-screen relative flex justify-center st--section-c">
      <!-- odd -->
      <div class="h-1/2 w-1/4 flex items-center justify-center bg-white text-black st--piston-odd">Y</div>
      <!-- even -->
      <div class="h-1/2 w-1/4 flex items-center justify-center top-auto bottom-0 self-end bg-black st--piston-even">E</div>
      <!-- odd -->
      <div class="h-1/2 w-1/4 flex items-center justify-center bg-white text-black st--piston-odd">A</div>
      <!-- even -->
      <div class="h-1/2 w-1/4 flex items-center justify-center top-auto bottom-0 self-end bg-black st--piston-even">H</div>
      <!-- -->
    </div>
    <!-- end -->
    <!-- section c2: pattern down -->
    <div class="w-screen bg-purple-800 min-h-screen flex items-center justify-center relative st--section-c2">
      <img src="https://kubikdesign.com.au/codepen/pattern.svg" class="st--pattern w-full absolute z-1 bottom-0 left-0">
      <div class="leading-none text-8xl">HELL<br>YEAH</div>
    </div>
    <!-- section c3: attempting to move c3 from top left to top right, then top right to bottom right -->
    <div class="w-screen bg-purple-700 min-h-screen flex items-center justify-center relative st--section-c3">
      <div class="absolute left-0 top-0 z-10 h-[80px] w-[80px] bg-black flex items-center justify-center text-20px text-white st--block-c3">3</div>
    </div>
    <!-- -->
    <div class="w-screen bg-purple-600 min-h-screen flex items-center justify-center">4</div>
    <div class="w-screen bg-purple-500 min-h-screen flex items-center justify-center">5</div>
  </section>
  <!-- end / -->
  <section class="bg-pink-600 min-h-screen flex items-center justify-center">D</section>
  <section class="bg-green-600 min-h-screen flex items-center justify-center">E</section>
  <!-- end sections // -->
  <!-- fake body -->
</body>
<!-- fake body -->
!

CSS 

              
                .st--block-c3 {
  z-index: 999
}

.bg-purple-600 {
  position: relative;
  z-index: -1
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger);

let sections = gsap.utils.toArray(".st--horizontal > div");
let scrollTween = gsap.to(sections, {
  xPercent: -100 * (sections.length - 1),
  ease: "none",
  scrollTrigger: {
    trigger: ".st--horizontal",
    pin: true,
    scrub: 1,
    snap: 1 / (sections.length - 1),
    // base vertical scrolling on how wide the container is so it feels more natural
    end: () => "+=" + document.querySelector(".st--horizontal").offsetWidth
  }
});

gsap.to(".st--piston-even, .st--piston-odd", {
  // odd goes -100%, even goes 100%
  y: (i) => (i % 2 ? "-100%" : "100%"),
  ease: "none",
  yoyo: true,
  repeat: 2,
  scrollTrigger: {
    trigger: ".st--section-c",
    containerAnimation: scrollTween,
    start: "left left",
    scrub: true
    // markers: true,
    // id: 'piston--odd',
  }
});

gsap.to(".st--pattern", {
  // v1
  yPercent: 50,
  ease: "none",
  scrollTrigger: {
    trigger: ".st--section-c2",
    containerAnimation: scrollTween,
    // start: 'left left',
    start: () =>
      "-=" + document.querySelector(".st--section-c2").offsetWidth + " left",
    end: () => "+=" + document.querySelector(".st--section-c2").offsetWidth * 2,
    scrub: true
  }
});

// attempting to move c3 from top left to top right, then top right to bottom right
var tl = gsap.timeline({
    scrollTrigger: {
        trigger: '.st--section-c3',
        containerAnimation: scrollTween,
        invalidateOnRefresh: true,
        scrub: true,
        start: 'left left',
        end: 'right left',
        markers: true,
        id: 'timeline'
    },
})

tl.to('.st--block-c3', {
    ease: 'none',
    x: () => document.querySelector('.st--section-c3').offsetWidth * 1.4,
}).to('.st--block-c3', {
    ease: 'none',
    y: () => document.querySelector('.st--section-c3').offsetHeight - 75,
    x: () => `-=${(document.querySelector('.st--section-c3').offsetWidth / 2) - 75}`,
})
!
999px

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