JSFiddle - React, Tailwind, and code Playground

HTML

<div class="roadmapstep">
    <div class="roadmapnumber">1</div>
    <h4>Header 1</h4>
    <div class="nextarrow"><img src="http://icons.mysitemyway.com/wp-content/gallery/retro-green-floral-icons-arrows/thumbs/thumbs_006243-retro-green-floral-icon-arrows-arrow-thick-right.png"></div>
</div>

<div class="roadmapstep2">
    <div class="roadmapnumber">2</div>
    <h4>Header 2</h4>
    <div class="nextarrow"><img src="http://icons.mysitemyway.com/wp-content/gallery/retro-green-floral-icons-arrows/thumbs/thumbs_006243-retro-green-floral-icon-arrows-arrow-thick-right.png"></div>
</div>

CSS

.nextarrow {
    position: absolute;
    top: 65px;
    margin-right: -35px;
    right: 0;
    width: 65px;
    height: 40px;  z-index:999999;
   
}
.roadmapstep {
    width: 220px;
    height: 150px;
    border-left: 1px solid black;
    border-top: 1px solid black;
    border-bottom: 1px solid black;
    float: left;
    position: relative;    
}
.roadmapstep2{
    width: 220px;
    height: 150px;
    border-left: 1px solid black;
    border-top: 1px solid black;
    border-bottom: 1px solid black;
    float: left;
    position: absolute;   z-index:-1;  left:220px

}