<div class="loader">
  <div></div>
  <div></div>
  <span></span>
</div>

body {
  font-family: 'open sans', sans-serif;
  background-color: #112;
}
.loader{
  width: 100px;
  height: 100px;
  margin: 50px auto;
  border-radius: 50%;
  background-color: rgba(200,20,20,0.2);
  position: relative;
  text-align: center;
  span{
    display: inline-block;
    background-color: #ddd;
    margin-top: 40px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    position: relative;
  }
  div{
    left: -20px;
    top: -20px;
    position: absolute;
    border-radius: 50%;
    width: 100px;
    height: 100px;
    border-width: 20px;
    border-style: solid;
    border-right-color: #ddd;
    border-left-color: #ddd;
    border-top-color: transparent;
    border-bottom-color: transparent;
    animation: outer 1.5s ease-in-out infinite;
    &:nth-child(2){
      transform: rotate(90deg) scale(.7);
      animation: inner 1.5s ease-in-out infinite;
    }
  }
}
@keyframes outer{
  to{
    transform:rotate(270deg) scale(.7);
  }
}
@keyframes inner{
  to{
    transform:rotate(360deg) scale(1);
  }
}