/*SIGNAL*/
/*source = http://codepen.io/brunjo/pen/vELmaP */
.radio-signal {
    border: 1px solid #707070;
    border-radius: 30px;
    left: 48.60%;
    opacity: 0;
    position: absolute;
    top: 50%;
    height: 50px;
    opacity: 0;
    width: 50px;
    z-index: 700;
    animation: pulsate 1.5s ease-out;
    animation-iteration-count: 1;
}

@keyframes pulsate {
    0% {
      transform: scale(.1);
      opacity: 0.0;
    }
    50% {
      opacity: 1;
    }
    100% {
      transform: scale(7);
      opacity: 0;
    }
}