body {
  background-color: #000000;
  color: #FFFFFF;
  font-family: 'Consolas',monospace;;
  background-image:url("/playground/img/bubbles.png");
  margin: auto;
 
  padding: 10px;
  background-attachment: fixed;
  word-wrap: break-word;
}
.center {
  margin-left: auto;
  margin-right: auto;
  width: 90%;
  padding: 10px;
  display: block;
  
 
}