.loader,
.loader div {
    box-sizing: border-box;
}

.loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, 0);

    width: 80px;
    height: 80px;
}

.loader div {
    position: absolute;
    top: 33.33333px;
    width: 13.33333px;
    height: 13.33333px;
    border-radius: 50%;
    background: #000000a1;
    animation-timing-function: cubic-bezier(0, 1, 1, 0);
}

.loader div:nth-child(1) {
    left: 8px;
    animation: loader1 0.6s infinite;
}

.loader div:nth-child(2) {
    left: 8px;
    animation: loader2 0.6s infinite;
}

.loader div:nth-child(3) {
    left: 32px;
    animation: loader2 0.6s infinite;
}

.loader div:nth-child(4) {
    left: 56px;
    animation: loader3 0.6s infinite;
}

@keyframes loader1 {
    0% {
        transform: scale(0);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes loader3 {
    0% {
        transform: scale(1);
    }

    100% {
        transform: scale(0);
    }
}

@keyframes loader2 {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(24px, 0);
    }
}