@Override
	public void draw(Graphics g) {
		// If the alien is alive, draw the ship
		if (Alive) {
			g.drawImage(img1, pos_x, pos_y, width, height, null);
		}
		// Otherwise draw an explosion
		else {
			g.drawImage(img2, pos_x, pos_y, width, height, null);
		}
	}