JS Bin// source https://jsbin.com/zakigis

jsbin.zakigis.js

const randomWait = (delay) => new Promise((resolve, reject) => {
    setTimeout(() => {
        if (Math.round(Math.random() * 2) % 2) {
            resolve("ok");
        } else {
            reject(new Error("wrong!"));
        }
    }, delay * 1000);
});

const main = async () => {
    try {
        const results = [];
        results.push(await randomWait(1));
        console.log(results);
        results.push(await randomWait(1));
        console.log(results);
    } catch(error) {
        console.log(error.message);
    }   
};

main();