SpinningCircleEffect/style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
    background: #000;
}
.loader{
    position: relative;
    width: 300px;
    height: 300px;
    animation: rotate 20s linear infinite;
}
.loader span{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(calc(36deg * var(--i)));
}
.loader span::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: transparent;
    border: 4px solid #00efff;
    box-sizing: border-box;
    box-shadow:
        0 0 20px #00efff,
        -30px -30px 0 #00efff,
        -30px -30px 20px #00efff,
        30px 30px 0 #00efff,
        30px 30px 20px #00efff,
        30px -30px 0 #00efff,
        30px -30px 20px #00efff,
        -30px 30px 0 #00efff,
        -30px 30px 20px #00efff;
    animation: animate 5s linear infinite;
    animation-delay: calc(-0.25s * var(--i));
    transform-origin: 20px;
    transition: 2s;
}
.loader:hover span::before{
    box-shadow:
        0 0 20px #00efff,
        -200px -200px 0 #00efff,
        -200px -200px 20px #00efff,
        200px 200px 0 #00efff,
        200px 200px 20px #00efff,
        200px -200px 0 #00efff,
        200px -200px 20px #00efff,
        -200px 200px 0 #00efff,
        -200px 200px 20px #00efff;
    transform-origin: 250px;
}
@keyframes animate{
    from{
        transform: rotate(0deg);
        filter: hue-rotate(0deg);
    }
    to{
        transform: rotate(360deg);
        filter: hue-rotate(360deg);
    }
}
@keyframes rotate{
    from{
        transform: rotate(0deg);
    }
    to{
        transform: rotate(360deg);
    }
}