.pulse {
    display: inline-block;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #2afc68;
    cursor: pointer;
    box-shadow: 0 0 0 rgba(42,252,104, 0.4);
    animation: pulse 2s infinite;
}
.pulse:hover {
    animation: none;
}

@-webkit-keyframes pulse {
    0% {
        -webkit-box-shadow: 0 0 0 0 rgba(42,252,104, 0.4);
    }
    70% {
        -webkit-box-shadow: 0 0 0 10px rgba(42,252,104, 0);
    }
    100% {
        -webkit-box-shadow: 0 0 0 0 rgba(42,252,104, 0);
    }
}
@keyframes pulse {
    0% {
        -moz-box-shadow: 0 0 0 0 rgba(42,252,104, 0.4);
        box-shadow: 0 0 0 0 rgba(0,0,0, 0.4);
    }
    70% {
        -moz-box-shadow: 0 0 0 10px rgba(42,252,104, 0);
        box-shadow: 0 0 0 10px rgba(42,252,104, 0);
    }
    100% {
        -moz-box-shadow: 0 0 0 0 rgba(42,252,104, 0);
        box-shadow: 0 0 0 0 rgba(42,252,104, 0);
    }
}

@keyframes stretch {
    0% {
        transform: scale(.3);
        background-color: #377cfb;
    }
    50% {
        background-color: rgba(55, 124, 251, 0.8);
    }
    100% {
        transform: scale(1.5);
        background-color: rgba(55, 124, 251, 0.5);
    }
}
@keyframes stretch-opp {
    0% {
        transform: scale(1.5);
        background-color: #377cfb;
    }
    50% {
        transform: scale(0.5);
        background-color: rgba(55, 124, 251, 0.5);
    }
    100% {
        transform: scale(0);
        background-color: rgba(55, 124, 251, 1);
    }
}