function takeOff(resolve) {
    setTimeout(function () {
        console.log("I just landed! Woooho!");
        resolve();
    }, 5000);
}

function callFriendAndTalkVeryExcitedlyAboutYourPrototype() {
    console.log("Hey friend, you will not believe what my mind stumbled upon...");
}

var promise = new Promise(takeOff);
promise.then(callFriendAndTalkVeryExcitedlyAboutYourPrototype);