function makePage() {
//<p>— <b>AUTH</b>DESC<i>BOOK</i>YEAR</p>
  let para = elt("p", "— ",
        elt("b", AUTH), DESC,
        elt("i", BOOK), YEAR
      ) 
  let span = elt("span", TEXT)
  span.style.color = "blue"
  let bold = elt("b", "Sample code")
  let pre  = elt("pre", makePage)
  let link = elt("a", "Creating nodes")
  link.href = BOOK_REF
  document.title = TITLE
  document.body = elt("body", 
      elt("h2", TITLE), 
      elt("hr"), 
      elt("blockquote", span, para), 
      elt("hr"), 
      elt("div", bold, pre), 
      elt("div", "Ref: ", link),
      elt("hr")
    )
  document.body.style.maxWidth = "420px"
}