#spanHour{
    background-color: red;
}
#spanMinute{
    background-color: green;
}
#spanSecond{
    background-color: blue;
}
.circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    font-size: 50px;
    color: #000;
    line-height: 100px;
    text-align: center;
  }