public void drawScreen(Graphics g) {
		for (int row = 0; row < 20; ++row) {
			for (int col = 0; col < 10; ++col) {
				Square s = screen[row][col];
				if (!s.isEmpty()) {
					drawSquare(s.getColor(), col * 35, row * 35, g);
				}
			}
		}
	}