*{
    background-color: teal;
}
#backgroundwindow{
    position: relative;
    z-index: -1;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
#text{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: black;
  background-color: rgba(255, 255, 255, 0);
}
a{
  color: blue;
  background-color: rgba(255, 255, 255, 0);
}
p{
  background-color: white;
}