testing async/await in `for` statement

async_await_test.js

(async () => {
    let v = 0;
    for(let i = 0; i < 10; ++i){
        x = await ((index) => {
            setTimeout(() => {
                console.log('🔥'.repeat(index + 1));
            }, index * 500);
            return index * index;
        })(i);
        console.log(x);
    }
})();