waitPromise.js

function wait(ms = 0) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

wait(200)
  .then(() => {
    console.log('Appeared after 200ms');
    return wait(500);
  })
  .then(() => {
    console.log('Appeared after 500ms');
    return wait(1000);
  })
  .then(() => {
    console.log('Appeared after 1s');
  })