JSFiddle - React, Tailwind, and code Playground

HTML

<div class="layer1 paralax">
   <div>
   </div> 
</div>
<div class="layer2 paralax">
   <div>
   </div> 
</div>

CSS

body,html{
    width: 100%;
    height: 100%;
}
.paralax>div{
    height: 3000px;
    
}
.layer1,.layer2,.layer3{
    background: rgba(0,0,0,0.2);
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100%;
    overflow: hidden;
    height: 100%;
} 

.layer1{
    z-index: 1;
}
.layer2{
    z-index: 2;
}
.quadra{
    width: 50px;
    height: 50px;
    position: absolute;
    background: black;
}
.circle{
    width: 50px;
    height: 50px;
    position: absolute;
    background: red;
    border-radius: 50px;
    
}