HTML
<div class="loading"></div>
CSS
.loading {
width: 60px;
height: 60px;
border: 5px solid rgba(200,200,200,0.4);
border-top-color: rgba(200,200,200,0.9);
border-radius: 50%;
animation: spin 1.2s linear 0s infinite;
}
@keyframes spin {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}