public void run() {

		//sets size of window
		setSize((BRICK_WIDTH * (BRICKS_IN_BASE + 1)),
				(BRICK_HEIGHT * (BRICKS_IN_BASE + 2)));

		for (int i = BRICKS_IN_BASE; i > 0; i--) {

			rowStartPositionX += BRICK_WIDTH / 2;

			for (int j = 0; j < i; j++) {
				GRect brick = new GRect(
						(rowStartPositionX + (j * BRICK_WIDTH)),
						rowStartPositionY, BRICK_WIDTH, BRICK_HEIGHT);
				add(brick);
			} //end of j

			rowStartPositionY -= BRICK_HEIGHT;

		} //end of i

	}