style.css

*{
    box-sizing: border-box;
}

body {
    background-color: lightseagreen;
}

.mid {
    display: flex;
}

#clockContainer {
    position: relative;
    margin: auto;
    height: 40vw;
    width: 40vw;
    background: url(clock.png) no-repeat;
    background-size: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
}

.mid {
    background-color: black;
    position: relative;
    z-index: 10;
    height: 1vw;
    width:  1vw;
    border-radius: 100%;
}

#hour, #minute, #second {
    position: absolute;
    background-color: blueviolet;
    border-radius: 10px;

    transform-origin: bottom;
}

#hour {
    width: 1%;
    height: 25%;
    top: 25%;
    left: 49.5%;
}

#minute {
    background-color:crimson;
    width: 0.6%;
    height: 30%;
    top: 20.5%;
    left: 49.7%;
}


#second {
    background-color: gold;
    width: 0.4%;
    height: 22%;
    top: 28%;
    left: 49.8%;

}