.loader {
    border-top: 12px solid #23C4D8;
    border-right: 12px solid #171D98;
    border-bottom: 12px solid #FD2BC0;
    border-left: 12px solid #55C95F;
    border-radius: 50%;
    width: 12px;
    height: 12px;
    animation: spin 2s linear infinite;
    margin:auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}