index.css

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

body{
    background-color: #ff0;
}
#clockContainer{
    position: relative;
    margin: auto;
    margin-top: 15px;
    width: 48vw;
    height: 48vw;
    background-image: url(clock.png);
    background-repeat: no-repeat;
    background-size: 100%;
    filter: drop-shadow(0 0 150px black);
}


#hour , #minute, #second{
    position: absolute;
    background-color: rgb(0, 0, 0);
    border-radius: 50px;
    transform-origin: bottom;
}

#hour{
    width: 1.7%;
    height: 20%;
    top: 30.33%;
    left: 49.29%;
    z-index: 1;
}

#minute{
    width: 1.1%;
    height: 30%;
    top: 20.33%;
    left: 49.66%;
    z-index: 2;
}

#second{
    background-color: red;
    width: 0.7%;
    height: 40%;
    top: 10.28%;
    left: 49.85%;
    z-index: 3;
    
}

#disc{
    background: radial-gradient(red,rgb(41, 41, 41),rgb(31, 31, 31),rgb(20, 20, 20),rgb(10, 10, 10),black);
    width: 4.6%;
    height: 4.5%;
    position: absolute;
    top: 47.8%;
    left: 47.7%;
    border-radius: 50%;
    filter: drop-shadow(0 0 10px rgb(22, 6, 6));
    z-index: 4;
}