JSFiddle - React, Tailwind, and code Playground

HTML

<div class="empty"></div>
<div class="broj">1.</div>
<div class="zadatak">Eliminacijski zadatak</div>
<div class="strelica-desno"></div>

CSS

.empty{
    width:30px;
    height:20px;
    border-bottom:1px solid #000;
    border-left:1px solid #000;
    position:absolute;
    top:45px;
    left:52px;
}

.broj {
    border-radius: 30px;
    width: 40px;
    height: 40px;
    background: #fff;
    border: 1px solid #000;
    color: #000;
    text-align: center;
    line-height:40px;
    position:absolute;
    top:45px;
    left:83px;
}

.zadatak{
    border-bottom: solid 1px #000;
    width:180px;
    text-align:center;
    position:absolute;
    top:45px;
    left:125px;
}

.strelica-desno {
	width: 0; 
	height: 0; 
	border-bottom: 10px solid transparent;
	border-top: 10px solid transparent; 
	border-left: 20px solid #000; 
	font-size: 0;
	line-height: 0;
    position:absolute;
    top:55px;
    left:303px;
}