body {
    color: white;
    background: #101010;
}

.led-box {
    background: black;
    position: relative;
    margin: 0px;
}

.led{
    width:20px;
    height: 20px;
    border-radius: 100%;
    position:absolute;
    background: radial-gradient(
        circle,
        rgba(255,255,255,1) 0%,
        rgba(128,128,255,1) 25%,
        rgba(0,0,255,1) 100%
    );
    opacity:0.2;
}