css loading 代码

.submiting {
        position:relative;
        text-indent: -110026px;
        background:#5ba4e5;
        &:before{
            content: "";
            position: absolute;
            width: 6px;
            height: 6px;
            border: 4px solid rgba(0,0,0,.2);
            border-radius: 10px;
            top: 50%;
            margin-top: -7px;
            left: 50%;
            margin-left: -7px;
        }

        &:after {
            content: "";
            position: absolute;
            width: 3px;
            height: 3px;
            background: rgba(0,0,0,.6);
            border-radius: 100px;
            top: 50%;
            margin-top: 2px;
            left: 50%;
            margin-left: 2px;
            animation: submiting 1s linear infinite;
            transform-origin: -2px -2px;
        }
    }

@keyframes submiting {
    from {
        transform: rotate(0);
    }
    to {
        transform: rotate(360deg);
    }
}