body {
  background-image: url('background1.jpg');
  background-repeat: no-repeat;
  background-attachment: fixed;  
  background-size: 90px 90px;
}




body {
  background: #7FFF00;

}

.clock {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  color: #17fe4d;
  font-size: 60px;
  font-family: Orbitron;
  letter-spacing: 7px;
}