Using pure CSS animation you can create a loading spinner for your site.

<div class="my_loader"></div>

Full URL example:

.my_loader {
    border: #eaeaea solid 10px;
    border-radius: 50%;
    border-top: #ff0000 solid 10px;
    width: 60px;
    height: 60px;
    animation: my_spinner 1s linear infinite;
}
@keyframes my_spinner {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}