#randomButton {
    display: block;
    margin: 0 auto;
    background-color: 1lightblue;
  }

#displayArea {
    margin: 15px 0 15px 0;
    text-align: center;
    font-size: 2.0em;
    font-weight: bold;
}

#myExistingLink {
    display: block;
    margin: 15px 0 15px 0;
    text-align: center;
}