public class Timer {
	private Callback callback = null;
	
	public void setCallback(Callback theCallback) {
		callback = theCallback;
	}
	
	public void run() {
		int tickNum = 0;

		while (true) {
			callback.tick(tickNum);
			tickNum = tickNum + 1;

			try {
				Thread.sleep(1000);
			} catch(InterruptedException e) {}
		}
	}
}