Clock implementation

clock.js

var Test = function () {
    this.eventsStorage = [];
    this.loopHendler = undefined;
};

Test.prototype.on = function (name, cb) {
    this.eventsStorage.push({
        name: name,
        fn: cb
    })
};

Test.prototype.invoke = function (eventName, args) {
    this.eventsStorage
        .filter(function (el) {
            return el.name == eventName;
        })
        .forEach(function (el) {
            el.fn.call(null, args);
        });
}

Test.prototype.startLoop = function (interval) {
    var eventName = 'tick';

    this.loopHendler = setInterval(function () {
        this.invoke(eventName, 'it is working');
    }.bind(this), interval);
};

Test.prototype.stopLoop = function () {
    clearInterval(this.loopHendler);
};

var t = new Test();

t.on('sec', function (arg) {
    console.log(arg);
});

t.on('min', function (arg) {
    console.log(arg);
});

t.on('hour', function (arg) {
    console.log(arg);
});

console.log('1111');

t.startLoop(1000);