promise1.es6

var aPromise = new Promise(function (resolve, reject) {
    resolve("a promise");
});

aPromise
    .then(returnAPromise)
    .then(returnAValue)
    .then(returnAPromise)
    .catch(handleAnyError);

function returnAPromise(value) {
    console.log(value);

    return new Promise(function (resolve, reject) {
        resolve(process.hrtime());
    });
};

function returnAValue(value) {
    console.log(value);
    return process.hrtime();
}

function handleAnyError(error) {
    console.log(error);
}