You can create rectangles at will using something like
private Rectangle board;
board = new Rectangle(x, y, width, height, this.getVertexBufferObjectManager());
board.setAlpha(0.0f);
board.setColor(0.04804f, 0.6274f, 0.4784f);
scene.attachChild(board);
You may or may not need to set the Alpha - this is just an excerpt from my code.