html{
    background-color: lightblue;
    border-width: 25px;
}
body{
    background-color: white;
    border: 10px solid lightblue;
    padding: 5px;
}
h1{
    text-align: center;
    font-size: 1.5em;
}
ol{
    font-size: 150%
}
img {
  display: block;
  margin-left: auto;
  margin-right: auto;