body {
background-color:#d0d0d0;
}


#wrapper {
    width:800px;
  height:450px;
  position:absolute;
  top:50%;
  left:50%;
  margin-top:-225px;
  margin-left:-400px;

}

#wrapper2 {
  position:absolute;
  width:400px;
  height:200px;
  top:50%;
  left:50%;
  margin-top:-100px;
  margin-left:-200px;

}