index.css

*{
    margin: 0px;
    padding: 0px;
}
#cont{
    position: relative;
    margin: auto;
    /* border: 5px solid black; */
    background: url("https://gunanshu02.github.io/analog%20clock/clock.jpg") no-repeat center ;
    /* background-color: white; */
    height: 50vw;
    width: 50vw;
    
    background-size: 100%;
  
}
#hours,#minutes,#seconds{
    position: absolute;
    background-color: black;
    transform-origin: bottom;
    
}
#hours{
    width: 3%;
    height: 25%;
    top: 25%;
    left: 48.25%;
    /* display: none; */
    /* background-color: red; */
    border-radius: 50%;

}
#minutes{
    width: 2%;
    height: 38%;
    top: 12%;
    /* background-color: red; */
    border-radius: 48%;
    left: 48.75%;
    /* display: none;  */
}
#seconds{
    width: 1%;
    height: 40%;
    top: 10%;
    /* background-color: red;    */
    left: 49.26%;
    border-radius: 47%;
    /* display: none; */
}