var myPromise = (i) => {

    let time = Math.floor(Math.random() * 5000) + 5000;

    console.log(`new promise ${i} for ${time}ms`)

    return new Promise((resolve, reject) => {

        let random = Math.floor(Math.random() * 2);

        setTimeout(() => {
            if (random == 1)
                resolve(`Yeah ${i}!`)
            else
                reject(new Error(`Whoa ${i}!`))
        }, time);

    })
    .then((ok) => {
        console.info(ok);
        return myPromise(i + 1);
    })
    .catch((err) => {
        console.error(err.message);
        return myPromise(i + 1);
    });
}

p = myPromise(1);

setInterval(() => console.log('-- state:', p), 500);