function christmasTree(height) {
  let star = "";
  for (let i = 0; i < height; i++) {
    let space = height - i;
    if (i == 0) {
      star += " ".repeat(space + 1) + "\n";
    }
    star += " ".repeat(space + 1);
    let zero = 2 * i + 1;
    star += "*".repeat(zero);

  }
  console.log(star);
 return star;
}