JS Bin// source https://jsbin.com/lapuxoq

jsbin.lapuxoq.js

const myAlert = () => {
  const x = "Foo Bar";
  let count = 0;
  const alerter = () => {
    console.log(`${x} ${++count}`);
  };
  
  return alerter;
};

const funcAlert = myAlert();
const funcAlert2 = myAlert();
funcAlert();
funcAlert();
funcAlert2();
funcAlert2();