import edu.kzoo.grid.display.DisplayMap;
import edu.kzoo.grid.display.ScaledImageDisplay;
import edu.kzoo.grid.gui.GridAppFrame;
import edu.kzoo.grid.gui.GridPkgFactory;
import edu.kzoo.grid.gui.nuggets.BasicHelpMenu;

import edu.kzoo.util.Debug;

public class MysteryApp
{

    public static void main(String[] args)
    {

        // Create and show the window containing the graphical user interface.
        GridAppFrame window = new MysteryGUI();

        window.includeMenu(new BasicHelpMenu("MysteryApp", "Your Name Here",
                                "with assistance from (whom?)",
                                "version date", "file:MysteryApp.html"));

        window.constructWindowContents("MysteryApp Program", null, 0, 0, 0);

        Grid grid = window.getGrid();
        while ( ! window.getController().programIsDone() )
        {
            for ( r = 0; r < grid.numRows(); r++ )
            {
                for ( c = 0; c < grid.numCols(); c++ )
                {
                    GridObject obj = grid.objectAt(new Location(r, c));
                    if ( obj != null )
                    {
                        obj.act();
                    }
                }
            }
        }

    }
}

======= THIS SHOULD BE IN A SEPARATE FILE =======

import edu.kzoo.grid.GridObject;
import edu.kzoo.grid.Location;
import edu.kzoo.util.Debug;

public class MysteryGridObject extends GridObject
{

    public void act()
    {
        Location something = getSomething();
        doIt(something);
    }

    protected Location getSomething()
    {
        int currentRow = location().row();
        int currentCol = location().col();
        return new Location(currentRow+1, currentCol);
    }

    protected void doIt(Location newLoc)
    {
        if ( ! grid().isEmpty(newLoc) )
            return;

        GridObject dupl = new MysteryGridObject();
        grid().add(dupl, newLoc);

        appController.getController().note(dupl);
    }
}