@keyframes pulsar {
    0% {
        transform: scale(0);
        opacity: 0.5;
    }
    75% {
        opacity: 0.5;
    }
    100% {
        transform: scale(1);
        opacity: 0.5;
    }
}

@-webkit-keyframes pulsar {
    0% {
        -webkit-transform: scale(0);
        opacity: 1;
    }
    75% {
        opacity: 0.5;
    }
    100% {
        -webkit-transform: scale(1);
        opacity: 0;
    }
}

.pulsar {
    width: 150px;
    height: 150px;
    margin: 0px auto;
    position: absolute;
}

.pulsar.static .ring,
.pulsar.static .circle {
    border: 50px solid rgba(255, 51, 51, 0.1);
}

.pulsar.animated .ring,
.pulsar.animated .circle {
    border: 50px solid rgba(255, 51, 51, 0.5);
}

.pulsar .ring,
.pulsar .circle {
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    box-shadow: inset 0 0 10px 0 red;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    margin-top: -50%;
    margin-left: -50%;
    -webkit-transform: scale(0);
    transform: scale(0);
}

.pulsar .circle {
    background-color: red;
    -webkit-transform: scale(0.12);
    transform: scale(0.12);
}

.pulsar.animated .ring:nth-child(2) {
    -webkit-animation: pulsar 2s 0s linear infinite;
    animation: pulsar 2s 0s linear infinite;
}

.pulsar.animated .ring:nth-child(3) {
    -webkit-animation: pulsar 2s .5s linear infinite;
    animation: pulsar 2s .5s linear infinite;
}

.pulsar.static .ring:nth-child(2) {
    background: rgba(255, 51, 51, 0.1);
    -webkit-transform: scale(0.5);
    transform: scale(0.5);
}

.pulsar.static .ring:nth-child(3) {
    background: rgba(255, 51, 51, 0.5);
    -webkit-transform: scale(0.8);
    transform: scale(0.8);
}