<div class="container">
<div class="bar">
<span class="bar-fill"></span>
</div>
</div>

.container{
  width:300px;
}
.bar{
  width:100%;
  background-color: #E3E3E3;
  border-radius:10px;
}

.bar-fill{
  height:15px;
  display:block;
  background:#0073CF;
  width:60%;
  border-radius:7.5px;
  -webkit-transition: width 0.8s ease;
  transition: width 0.8s ease;
}