java-script-promises-with-async-await-and-loops-8-callback-hell.js

console.log('1 | print immediately');
delay(() => '2 | print me after one second', 1000)
  .then(result => {
    console.log(result);
    delay(() => '3 | print me one second after line 2', 1000)
      .then(result => {
        console.log(result);
        /* ...CALLBACK HELL... */
      });
  });