index.html

<nav>
    <ul class="pagination">   
        <li class="done">
            <a href="#">&nbsp;</a>
        </li>
        <li><span>2</span></li>  
        <li><span>3</span></li>
    </ul>
</nav>

style.css

*,*:after,*:before{
    box-sizing: border-box;
}
nav {
  width: 100%;
  text-align: center;
}
nav ul {
    display: inline-block;
    list-style-type: none;
}
ul{
    margin: 0;
    padding: 0;
}
.pagination > li{
    overflow: hidden;
    position: relative;
    margin-top: 5px;
    width: 60px;
    float: left;
    list-style: none;
    padding: 0;
}

.pagination > li > a, .pagination > li > span{
    line-height: 25px;
    text-decoration: none;
    color: #FFF;
    display: block;
    text-align: center;
    font-weight: bold;
    position: relative;
}
/*positon the circle*/
.pagination > li > a:before, .pagination > li > span:before{
    content:'';
    position: absolute;
    z-index: -1;
    width: 25px; height: 25px;
    left: 50%; margin-left: -13px;
    border-radius: 100%;
    border: 1px solid #FFF;
    background: #CCC;
    transition: all .2s;
}

.pagination > li.done > a:before, .pagination > li.done > span:before{
    background: blue;
}
.pagination > li.done > a:after, .pagination > li.done > span:after {
  content: " ";
  display: block;
  width: 8px;
  height: 15px;
  border: solid white;
  border-width: 0 3px 3px 0;
  position: absolute;
  left: 25px;
  top: 5px;
  margin-top: -2px;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

/*positioning the line*/
.pagination > li:not(:last-of-type):after,
.pagination > li:not(:first-of-type):before{
    content: '';
    position: absolute;
    background: #CCC;
    top: 13px;
    height: 1px;
}
.pagination > li:first-of-type:after{
    left: 50%;
    right: 0;
    margin-left: 15px;
}
.pagination > li:not(:first-of-type):before{
    left: 0;
    right: 50%;
    margin-right: 15px;    
}
.pagination > li:not(:first-of-type):after{
    right: 0;
    left: 50%;
    margin-left: 15px;
}