body {
  text-align: center;
}

.result {
  font-size: 36px;
}
.background {
  background-image: url("path/to/image.jpg");
  /* Other properties you want to set */
}
.container {
  background-color: #cccccc;
  padding: 20px;
  margin: auto;
  width: 300px;
  center
}let's