.call-animation {
    background: #fff;
    width: auto;
    height: auto;
    position: relative;
    margin: 0 auto;
    border-radius: 100%;
    border: solid 5px #fff;
    animation: play 2s ease infinite;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    backface-visibility: hidden;

}

@keyframes play {

    0% {
        transform: scale(1);
    }
    15% {
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.4);
    }
    25% {
        box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.4), 0 0 0 8px rgba(255, 255, 255, 0.2);
    }
    25% {
        box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.4), 0 0 0 12px rgba(255, 255, 255, 0.2);
    }

}