.lds-ring
{
    display: inline-block;
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
}
.lds-ring div
{
    box-sizing: border-box;
    display: block;
    position: fixed;
    left: 50%;
    top: 50%;
    width: 64px;
    height: 64px;
    margin: 8px;
    border: 8px solid #fff;
    border-radius: 50%;
    animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: #fff transparent transparent transparent;
}
.lds-ring div:nth-child(1)
{
    animation-delay: -0.45s;
}
.lds-ring div:nth-child(2)
{
    animation-delay: -0.3s;
}
.lds-ring div:nth-child(3)
{
    animation-delay: -0.15s;
}
@keyframes lds-ring
{
    0%
    {
        transform: rotate(0deg);
    }

    100%
    {
        transform: rotate(360deg);
    }
}