div#wave {
    position: relative;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}
div#wave .dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 3px;
    background: #ffffff;
    animation: wave 1.3s linear infinite;
}
div#wave .dot:nth-child(2) {
    animation-delay: -1.1s;
}
div#wave .dot:nth-child(3) {
    animation-delay: -0.9s;
}

@keyframes wave {
    0%, 60%, 100% {
        transform: initial;
    }
    30% {
        transform: scale(1.3);
    }
}