body {
  background-image: url("bluecloud.gif");
  text-align: center;
  margin: 17%;
  font-family: 'Courier New', monospace; 
  color: white;
  font-size: 30px;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%; 
}