body {
  background-image: url("https://wigglepiplup.neocities.org/Bliss_4k.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}
h1 {
  font-size:55px;
  text-align:center;
  font-family:courier;
}
h2 {
  font-size:35px;
  font-family:courier;
}
h3 {
  font-size:25px;
  font-family:courier;
}
ul {
  border:2px solid MediumSeaGreen;
  padding:20px;
}