JSFiddle - React, Tailwind, and code Playground

by confile

HTML

<div class="box" id="box1"></div>
<div class="box" id="box2"></div>
<div class="box" id="box3"></div>

<div class="line" id="line1"></div>
<div class="line" id="line2"></div>

CSS

.box{
    border: 1px solid black;
    background-color: #ccc;
    width: 100px;
    height: 100px;
    position: absolute;
}
.line{
    width: 1px;
    height: 100px;
    background-color: black;
    position: absolute;
}

#box1{
    top: 0;
    left: 0;
}
#box2{
    top: 200px;
    left: 0;
}
#box3{
    top: 250px;
    left: 200px;
}
 #line1{
     top: 100px;
    left: 50px;
 }
#line2{
    top: 220px;
    left: 150px;
    height: 115px;
    transform: rotate(120deg);
        -webkit-transform: rotate(120deg);
        -ms-transform: rotate(120deg);
}