function synchronizedFor (_start, _end, _iteration) {
    return new Promise (function (resolveAll, rejectAll) {
        var currentIndex = _start;
        var isPromisInProgres = false;

        var interval = setInterval (function () {
            if (!isPromisInProgres) {
                if (currentIndex >= _end) {
                    clearInterval (interval);
                    resolveAll ();
                }
                else {
                    new Promise (function (resolve, reject) {
                        isPromisInProgres = true;
                        _iteration (currentIndex, resolve);
                    }).then (function () {
                        isPromisInProgres = false;
                        ++currentIndex;
                    });
                }
            }
        }, 50);
    });
}