.loader {
    width: 50px;
    aspect-ratio: 1;
    display: grid;
    border: 4px solid #0000;
    border-radius: 50%;
    border-color: #ccc #0000;
    animation: l16 1s infinite linear;
}

.loader::before,
.loader::after {
    content: "";
    grid-area: 1/1;
    margin: 2px;
    border: inherit;
    border-radius: 50%;
}

.loader::before {
    border-color: #f03355 #0000;
    animation: inherit;
    animation-duration: .5s;
    animation-direction: reverse;
}

.loader::after {
    margin: 8px;
}

@keyframes l16 {
    100% {
        transform: rotate(1turn)
    }
}