body { background: #000; }
img { border: 0; }
#core {
    width: 400px;
    height: 400px;
    background: url(uc.jpg) 0 0 no-repeat #000;
    margin: 50px auto 0 auto;
}
#twit {
    width: 160px; height: 27px;
    margin: 20px auto 0 auto;
}