body {
    background-color: black;
    color: aliceblue;
    text-align: center; 
    font-family: Arial, Helvetica, sans-serif;
}

.clock {
    font-size: xx-large;
    margin-top: 20%;
    margin-bottom: 20%;
    background-color: blue;
    border-radius: 5px;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}