public void drawWorld(Graphics g) {
		Graphics2D g2 = (Graphics2D) g;
		World world = universe.getWorld();
		int width = world.getWidth();
		int height = world.getHeight();
		for(int i = 0; i < width; i++) {
			for (int j = 0; j < height; j++) {
				Color color = world.getCellAt(i, j) == Cell.LIVING ? Color.DARK_GRAY:  Color.CYAN;
				drawCell(color, i, j, g2);
			}
		}
	}