private void setBrickField() {

		int startPositionY = BRICK_Y_OFFSET;

		for (int i = 0; i < NBRICK_ROWS; i++) {
			
			for (int j = 0; j < NBRICKS_PER_ROW; j++) {
				GRect brick = new GRect((BRICK_SEP / 2) + j * (BRICK_WIDTH + BRICK_SEP),
						startPositionY + i * (BRICK_HEIGHT + BRICK_SEP),
						BRICK_WIDTH, BRICK_HEIGHT);
				brick.setFilled(true);
				brick.setColor(COLORS[i/2]);
				brick.setFillColor(COLORS[i/2]);
				add(brick);
				brickCounter++;
			}
		}
	} //end setBrickField()