Scary People

scary-people-naive.js

function scaryPeople(n) {
  if (!n) {
    return "Normal people scare me";
  }
  const quote = n%2 ? '"' : "'";
  return "Normal people wearing "+quote+scaryPeople(n-1)+quote+" t-shirts scare me";
}

scary-people-tco-2.js

function scaryPeople(n, str='Normal people scare me') {
  if (!n) {
    return str;
  }
  const quote = n%2 ? '"' : "'";
  return scaryPeople(n-1, "Normal people wearing "+quote+str+quote+" t-shirts scare me");
}

scary-people-tco.js

function scaryPeople(n, front='', back='') {
  if (!n) {
    return front+"Normal people scare me"+back;
  }
  const quote = n%2 ? '"' : "'";
  return scaryPeople(n-1,  "Normal people wearing "+quote, quote+" t-shirts scare me");
}