돌아가는 아이콘

.slow-spin {
  -webkit-animation: fa-spin 6s infinite linear;
  animation: fa-spin 6s infinite linear;
}

<link rel="stylesheet"
 href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css"/>

<i class = "fa fa-cog fa-5x slow-spin"></i>