ul {
  list-style: none;
  width: 50%;
  counter-reset: my-sec-counter;
  position: relative;
  padding-top: 30px;
  padding-bottom: 1px;
  margin: 0; }
  ul:after {
    content: '';
    width: 0;
    height: 100%;
    position: absolute;
    border: 1px solid #cbcbcb;
    top: 0;
    left: 20px;
    z-index: 1; }
  ul li {
    margin-bottom: 40px;
    margin-left: 60px;
    display: flex;
    align-items: center;
    counter-increment: my-sec-counter; }
    ul li .circle {
      border-radius: 100%;
      background: #fff;
      content: "";
      padding: 2px;
      border: 2px solid #cbcbcb;
      text-align: center;
      width: 12px;
      height: 12px;
      display: inline-block;
      z-index: 2;
      position: absolute;
      left: 11px; }
    ul li .cube {
      border-radius: 8px;
      background: #cbcbcb;
      content: "";
      padding: 2px;
      border: none;
      width: 47px;
      height: 47px;
      position: absolute;
      left: 40px; }
      ul li .cube:before {
        content: counter(my-sec-counter);
        font-size: 30px;
        font-weight: bold;
        position: absolute;
        margin-left: 16px;
        margin-top: 6px; }