@-webkit-keyframes ball-beat
{
    50%
    {
        -webkit-transform: scale(.75);
                transform: scale(.75); 

        opacity: .2;
    }
    100%
    {
        -webkit-transform: scale(1);
                transform: scale(1); 

        opacity: 1;
    }
}

@-moz-keyframes ball-beat
{
    50%
    {
        -moz-transform: scale(.75);
             transform: scale(.75); 

        opacity: .2;
    }
    100%
    {
        -moz-transform: scale(1);
             transform: scale(1); 

        opacity: 1;
    }
}

@-o-keyframes ball-beat
{
    50%
    {
        -o-transform: scale(.75);
           transform: scale(.75); 

        opacity: .2;
    }
    100%
    {
        -o-transform: scale(1);
           transform: scale(1); 

        opacity: 1;
    }
}

@keyframes ball-beat
{
    50%
    {
        -webkit-transform: scale(.75);
           -moz-transform: scale(.75);
             -o-transform: scale(.75);
                transform: scale(.75); 

        opacity: .2;
    }
    100%
    {
        -webkit-transform: scale(1);
           -moz-transform: scale(1);
             -o-transform: scale(1);
                transform: scale(1); 

        opacity: 1;
    }
}

.ball-beat > div
{
    display: inline-block;

    width: 15px;
    height: 15px;
    margin: 2px;

    -webkit-animation: ball-beat .7s 0s infinite linear;
       -moz-animation: ball-beat .7s 0s infinite linear;
         -o-animation: ball-beat .7s 0s infinite linear;
            animation: ball-beat .7s 0s infinite linear; 

    border-radius: 100%;
    background-color: #55595c;

    -webkit-animation-fill-mode: both;
       -moz-animation-fill-mode: both;
         -o-animation-fill-mode: both;
            animation-fill-mode: both;
}
.ball-beat > div:nth-child(2n-1)
{
    -webkit-animation-delay: -.35s !important;
       -moz-animation-delay: -.35s !important;
         -o-animation-delay: -.35s !important;
            animation-delay: -.35s !important;
}