public void updateGrid() {
    grid.setGrid();
    Block[][] shape = activeShape.getShape();
    for (int i = 0; i < shape.length; i ++) {
        for (int j = 0; j < shape[i].length; j++) {
          if (alterShape != null) {
            grid.setTrue(shape[i][j].getPosX()/BLOCK_SIZE, shape[i][j].getPosY()/2 *BLOCK_SIZE);
          }
        }
      }

    for (Shape s: shapes) {
      shape = s.getShape();
      for (int i = 0; i < shape.length; i ++) {
        for (int j = 0; j < shape[i].length; j++) {
          if (alterShape != null) {
            grid.setTrue(shape[i][j].getPosX()/BLOCK_SIZE, shape[i][j].getPosY()/2 *BLOCK_SIZE);
          }
        }
      }
    }
  }