.loader {
    border: 10px solid #f3f3f3;
    border-radius: 70%;
    border-top: 10px solid #6dc157;
    border-bottom: 10px solid #6dc157;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
    opacity: 0.8;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
    }
}

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

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