#preload{
    margin: 350px auto;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

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