JSFiddle - React, Tailwind, and code Playground

HTML

<div id="blok"></div>
<div id="blok-1"></div>

CSS

#blok, #blok-1{
    position: absolute;
    border:1px solid black;
}

#blok {
    background:red;
    width:300px;
    height: 200px;
    z-index: 1;
    
}
#blok-1 {
    background:blue;
    width: 150px;
    height: 300px;
    margin-left:30px;
    z-index: 2;
}