#bdc {
    font-family: sans-serif;
    font-size: 50px;
    font-weight: bold;
}

#bdc span {
    text-align: center;
    width: 80px;
    height: 80px;
    display: inline-block;
    margin-left: 10px;
    margin-right: 10px;
    line-height: 60px;
}

#bdc_days {
    background: url('../images/sky_days.png');
}

#bdc_hours {
    background: url('../images/sky_hours.png');
}

#bdc_minutes {
    background: url('../images/sky_minutes.png');
}

#bdc_seconds {
    background: url('../images/sky_seconds.png');
}