html{
  background-color: #000000;
  color: #ffffff;
  height: 100%;
  width: 100%;
  padding: 0px;
  margin: 0px;
}
body{
  width: 100%;
  height: 100%;
  margin: 0px;
  padding: 0px;
  position: relative;
}
img{
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  max-width: 50%;
  max-height: 50%;
  margin: auto;
}