Infinite async loop

infinite_timed_loop.js

var infiniteTimedLoop = (function() {
    var 
        task,
        interval = 100,
        status = false,
        i = 0;

    function start() {
        if(!status) {
            return;
        }

        task(i++);

        setTimeout(start, interval);
    };

    return {
        setInterval: function(ms) {
            interval = ms;
            return this;
        },
        start: function() {
            status = true;
            start();
            return this;
        },
        stop: function() {
            status = false;
            return this;
        },
        sleep: function(ms) {
            var self = this;
            this.stop();
            
            setTimeout(self.start, ms);
            return this;
        },
        do: function(newTask) {
            task = newTask;
            return this;
        }
    };
})();

// API

// Set the task
infiniteTimedLoop.do(console.log);

// Start
infiniteTimedLoop.start();

// Sleep 1 second (1000 ms)
infiniteTimedLoop.sleep(1000);

// Stop
infiniteTimedLoop.stop();

// And start again!
infiniteTimedLoop.start();