a .line1 {
    width: 30px;
    height: 30px;
    position: absolute;
    margin: -20px 0 0 -20px;
    border: 2px solid #fff;
    border-radius: 80px 80px 80px 80px;
    border-right-color: transparent;
    border-top-color: transparent;
}

a .line2 {
    width: 40px;
    height: 40px;
    position: absolute;
    margin: -25px 0 0 -25px;
    border: 2px solid #fff;
    border-radius: 100px 100px 100px 100px;
    border-right-color: transparent;
    border-left-color: transparent;
}

a .line3 {
    width: 50px;
    height: 50px;
    position: absolute;
    margin: -30px 0 0 -30px;
    border: 2px solid #fff;
    border-radius: 120px 120px 120px 120px;
    border-right-color: transparent;
}

@-webkit-keyframes line1 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    20% {
        -webkit-transform: rotate(720deg);
        transform: rotate(720deg);
    }

    50% {
        -webkit-transform: rotate(1080deg);
        transform: rotate(1080deg);
    }

    75% {
        -webkit-transform: rotate(1300deg);
        transform: rotate(1300deg);
    }

    100% {
        -webkit-transform: rotate(2500deg);
        transform: rotate(2500deg);
    }
}

@keyframes line1 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    20% {
        -webkit-transform: rotate(720deg);
        transform: rotate(720deg);
    }

    50% {
        -webkit-transform: rotate(1080deg);
        transform: rotate(1080deg);
    }

    75% {
        -webkit-transform: rotate(1300deg);
        transform: rotate(1300deg);
    }

    100% {
        -webkit-transform: rotate(2500deg);
        transform: rotate(2500deg);
    }
}

a .line1 {
    -webkit-animation: line1 14s ease-in-out 1s infinite alternate;
    animation: line1 15s ease-in-out 1s infinite alternate;
}

@-webkit-keyframes line2 {
    from {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }

    to {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
}

@keyframes line2 {
    from {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }

    to {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
}

a .line2 {
    -webkit-animation: line2 3s ease-in-out infinite;
    animation: line2 3s ease-in-out infinite;
}

@-webkit-keyframes line3 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    20% {
        -webkit-transform: rotate(720deg);
        transform: rotate(720deg);
    }

    50% {
        -webkit-transform: rotate(1080deg);
        transform: rotate(1080deg);
    }

    75% {
        -webkit-transform: rotate(1300deg);
        transform: rotate(1300deg);
    }

    100% {
        -webkit-transform: rotate(2500deg);
        transform: rotate(2500deg);
    }
}

@keyframes line3 {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    20% {
        -webkit-transform: rotate(720deg);
        transform: rotate(720deg);
    }

    50% {
        -webkit-transform: rotate(1080deg);
        transform: rotate(1080deg);
    }

    75% {
        -webkit-transform: rotate(1300deg);
        transform: rotate(1300deg);
    }

    100% {
        -webkit-transform: rotate(2500deg);
        transform: rotate(2500deg);
    }
}

a .line3 {
    -webkit-animation: line3 20s ease-in-out infinite;
    animation: line3 20s ease-in-out infinite;
}