body {
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
}
.progress1, .progress2, .progress3, .progress4 {
    margin: 0 auto;
    width: 50%;
}
#loading1, #loading2, #loading3, #loading4 {
    position: absolute;
    left: 50%;
    font-weight: bold;
}