gistfile1.js

(function () {
    'use strict';

    var get_synchronizer = function (delay, callback) {
        var pretime = new Date().getTime();
        return function () {
            var curtime = new Date().getTime();
            console.log(curtime - pretime);
            if (curtime - pretime >= delay) {
                callback();
                pretime = curtime;
            }
        }
    };

    var sync = get_synchronizer(5000, function () {
        console.log("il est " + new Date);
    });

    var runner = function () {
        sync();
        setTimeout(runner, 1000);
    };
    runner();

})(window);