#loader {
    animation: animate 1.5s linear infinite;
    clip: rect(0, 80px, 80px, 40px);
    height: 80px;
    width: 80px;
    position: absolute;
    left: calc(50% - 40px);
    top: calc(50% - 40px);
}

@keyframes animate {
    0% {
        transform: rotate(0deg)
    }

    100% {
        transform: rotate(220deg)
    }
}

#loader:after {
    animation: animate2 1.5s ease-in-out infinite;
    clip: rect(0, 80px, 80px, 40px);
    content: '';
    border-radius: 50%;
    height: 80px;
    width: 80px;
    position: absolute;
}

@keyframes animate2 {
    0% {
        box-shadow: inset #fff 0 0 0 17px;
        transform: rotate(-140deg);
    }

    50% {
        box-shadow: inset #fff 0 0 0 2px;
    }

    100% {
        box-shadow: inset #fff 0 0 0 17px;
        transform: rotate(140deg);
    }
}