Async Await

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

async function sleep (forHowLong) {
    await timeout(forHowLong);
};

async function asyncFn () {
    await sleep(0);
    console.log(3);
    await sleep(1000);
    console.log(2);
    await sleep(1000);
    console.log(1);
    await sleep(1000);
    console.log('DONE');
};

asyncFn();