* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

section {
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
    background: #000;
//    animation: animateBg 10s linear infinite;
}
@keyframes animateBg {
    0% {
        filter:hue-rotate(0deg);
    }
    100% {
        filter:hue-rotate(360deg);
    }
}

section .loader {
    position: relative;
    width: 120px;
    height: 120px;
}

section .loader span {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    transform: rotate(calc(18deg * var(--i)));
}

section .loader span::before {
    content:'';
    position:absolute;
    top:0;
    left:0;
    width:15px;
    height:15px;
    border-radius:50%;
    background: #007fff;
    box-shadow: 0 0 10px #007fff,
                0 0 20px #007fff,
                0 0 40px #007fff,
                0 0 60px #007fff,
                0 0 80px #007fff,
                0 0 100px #007fff,
                0 0 120px #007fff;
    animation: animate 1.5s linear infinite;
    animation-delay: calc(var(--i)*0.075s);
}
@keyframes animate {
    0% {
        transform:scale(1);
    }
    80%,100% {
        transform:scale(0);
    }
}