<h2>Scroll down</h2>
<h1>I'm revealed on scroll!</h1>
@import url('https://fonts.googleapis.com/css?family=Signika+Negative:300,400&display=swap');
body { 
  font-family: "Signika Negative", sans-serif; 
  font-weight: 300;
  text-align: center;
  height: 150vh;
}
h1 {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
const tl = gsap.timeline({paused: true});
tl.from("h1", {scale: 0.7, autoAlpha: 0, duration: 1});

function animateAtScrollPos() {
  if(scrollY > 100) {
    tl.play();
    document.removeEventListener("scroll", animateAtScrollPos);
  }
}
document.addEventListener("scroll", animateAtScrollPos);
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External CSS

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