bluebird-delay.js

const bluebird = require('bluebird');

bluebird.delay(1000, 'done 1000').then((result) => {
  console.log(result);
});

bluebird.delay(1000, 'done 2000').then((result) => {
  console.log(result);
});

bluebird.delay(500, 'done 500').then((result) => {
  console.log(result);
});