// Show my grid of cells.
    // --------------------------------------------------------------
    public void display (Graphics g) {
        for (int r = 0; r < nRows; r++) {
            for (int c = 0; c < nCols; c++) {
    // REPLACE THIS LINE
    // theGrid[r][c].display((2+r)*Cell.size,(3+c)*Cell.size,g);
    // BY THE LINE THAT FOLLOWS
                theGrid[r][c].display((2+c)*Cell.size,(3+r)*Cell.size,g);
            }
        }
    }