body {
    background-color: rgba(23, 24, 25, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.loader, .loader:before, .loader:after {
    border-radius: 50%;
    width: 1.5em;
    height: 1.5em;
    animation-fill-mode: both;
    animation: bblFadInOut 1.8s infinite ease-in-out;
}
.loader {
    color: rgba(45, 237, 230, 1);
    font-size: 7px;
    position: relative;
    text-indent: -9999em;
    transform: translateZ(0);
    animation-delay: -0.16s;
}
.loader:before,
.loader:after {
    content: '';
    position: absolute;
    top: 0;
}
.loader:before {
    left: -2em;
    animation-delay: -0.32s;
}
.loader:after {
    left: 2em;
}
@keyframes bblFadInOut {
    0%, 80%, 100% { box-shadow: 0 2.5em 0 -1.3em }
    40% { box-shadow: 0 2.5em 0 0 }
}