ul.timeline {
    list-style-type: none;
    position: relative;
}

ul.timeline:before {
    content: ' ';
    background: #d4d9df;
    display: inline-block;
    position: absolute;
    left: 29px;
    width: 2px;
    height: 100%;
    z-index: 400;
}

ul.timeline > li {
    margin: 20px 0;
    padding-left: 20px;
}


ul.timeline > li.timeline-default:before {
    border: 3px solid #6c757d;
}


ul.timeline > li.timeline-success:before {
    border: 3px solid #22e85a;
}


ul.timeline > li.timeline-warning:before {
    border: 3px solid #ffc107;
}


ul.timeline > li.timeline-danger:before {
    border: 3px solid #dc3545;
}


ul.timeline > li.timeline-duration:before {
    content: ' ';
    background: black;
    display: inline-block;
    position: absolute;
    border-radius: 50%;
    border: 3px solid #000000;
    left: 26px;
    width: 8px;
    height: 8px;
    z-index: 400;
    margin-top: 10px;
}


ul.timeline > li:before {
    content: ' ';
    background: white;
    display: inline-block;
    position: absolute;
    border-radius: 50%;
    border: 3px solid #22c0e8;
    left: 18px;
    width: 24px;
    height: 24px;
    z-index: 400;
}