body {
    background-image: url('library.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    margin: 0;
}
.container {
  text-align: center;
}
h1 {
  color: white;
  font-size: 80px;
}
#snoopy {
  width: 500px;
  height: 500px;
}
#charlie {
  width: 700px;
  height: 500px;
}
#lucy {
  width: 500px;
  height: 500px;
}