body {
  margin: 0;
    font-family: courier, monospace;

}
section {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background-size: cover;
  background-attachment: fixed;
  background-repeat: no-repeat;
}

section:nth-of-type(1) {
  background-image: url('https://nicool.neocities.org/Images/bg.jpeg');
}