ol.square {
  counter-reset: my-counter;
  list-style: none;
  padding: 0;
}
 
ol.square li {
  padding-left: 30px;
  position: relative;
}
ol.square li:before {
  content: counter(my-counter);
  counter-increment: my-counter;
  background-color: #D51B16;
  color: #fff;
  display: block;
  float: left;
  line-height: 1.2em;
  margin-left: -31px;
  margin-top: 3px;
  text-align: center;
  height: 1.3em;
  width: 1.3em;
  border-radius: 0%;
}