const wait = (millisecondsToWait) => new Promise((resolve) => {
  setTimeout(resolve, millisecondsToWait);
});

wait(1000).then(() => {
  console.log("First promise");
  return wait(2000);
}).then(() => {
  console.log("Second promise");
  return wait(2500);
}).then(() => {
  console.log("Third promise");
  return wait(3000);
});