.loader {
    width: 15px;
    aspect-ratio: 1;
    border-radius: 50%;
    animation: l5 1s infinite linear alternate;
    margin: 0 auto;
}

@keyframes l5 {
    0% {
        box-shadow: 20px 0 #58595B, -20px 0 #72818A;
        background: #58595B
    }

    33% {
        box-shadow: 20px 0 #58595B, -20px 0 #72818A;
        background: #72818A
    }

    66% {
        box-shadow: 20px 0 #72818A,-20px 0 #58595B;
        background: #72818A
    }

    100% {
        box-shadow: 20px 0 #72818A,-20px 0 #58595B;
        background: #58595B
    }
}