<div class="heading">
  Scroll Down
</div>
<div class="box" style="background-image: url(https://images.unsplash.com/photo-1711924847907-498771a92bde?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MTM5MjI5OTl8&ixlib=rb-4.0.3&q=85);"></div>
<div class="box" style="background-image: url(https://images.unsplash.com/photo-1585110396000-c9ffd4e4b308?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MTM5MjM0MjF8&ixlib=rb-4.0.3&q=85);"></div>

<div class="box" style="background-image: url(https://images.unsplash.com/flagged/photo-1557665159-2dfaf0ab25ac?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MTM5MjM0MjF8&ixlib=rb-4.0.3&q=85);"></div>

<div class="box" style="background-image: url(https://images.unsplash.com/photo-1592194996308-7b43878e84a6?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MTM5MjM0NTV8&ixlib=rb-4.0.3&q=85);"></div>

body {
  font-family: tahoma;
  margin: 0;
  box-sizing: border-box;
  line-height: 1.6;
  font-size: calc(max(0.8vw, 4px) + max(0.8vh, 4px));
  color: #000;
  transition: 0.2s all;
  font-size: 1rem;
}


.heading {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
  padding: 10vh 0;
  text-transform: uppercase;
  font-size: 2rem;
  font-weight: bold;
  box-sizing: border-box;
}


.box {
    top: -30%;
  position: sticky;
  z-index: 0;
  background-color: grey;
  background-image: url(https://images.unsplash.com/photo-1711924847907-498771a92bde?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MTM5MjI5OTl8&ixlib=rb-4.0.3&q=85);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  \\ background-attachment: fixed;
  height: 130vh;
  min-height: 500px;
}