body{
    padding: 0;
    margin: 0;
    overflow: hidden;
}
iframe{
    border: hidden;
    width: 100%;
    height: 100%;
}
.upper{
 width: 100%;
}
.upper iframe{
    height: 450px;
}
.lower{
    width: 100%;
}
.lower iframe{
    height: 500px;
}

footer{
  position: relative;
  bottom: 0;
}