#countdown {
    font-size: 72px;
    text-align: center;
    margin-top: 50px;
  }
/* make the whole page green */
body {
    background-color: green;
  }
  
  /* create a blue box around the countdown */
  #countdown {
    font-size: 72px;
    text-align: center;
    margin-top: 50px;
    padding: 20px;
  }