import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class CATest extends Applet implements ActionListener {
    int number = 351;
    Cell c[];
    int mode;
    boolean drawn = false;
    List list;
    
    public void init() {
	number = getSize().width / 2 - 5;
	c = new Cell[number];
	try {
	    mode = Integer.parseInt(getParameter("mode"));
	} catch (NumberFormatException e) {mode=30;}
	for (int i = 0; i < number; ++i) {
	    c[i] = new Cell(mode);
	    if (i == number / 2) {
		c[i].setState(true);
	    }
	}
	list = new List(4);
	list.addActionListener(this);
	for (int i = 0; i < 255; ++i) {
	    list.add(new Integer(i).toString());
	}
	list.select(mode);
	add(list);
    }

    public void start() {
	setBackground(new Color(255, 255, 255));
    }
    
    public void paint(Graphics g) {
	for (int i = 0; i < number; ++i) {
	    c[i].setState(false);
	    if (i == number / 2) {
		c[i].setState(true);
	    }
	}
	for (int j = 0; j < number; ++j) {
	    c[j].draw(g, j * 2, 100);
	}

	for (int i = 0; i < number / 2; ++i) {
	    //	    int pos = 0;
	    boolean next_states[] = new boolean[number];
	    next_states[0] = c[0].getNextState(new Cell(mode), c[1]);
	    for (int j = 1; j < number - 1; ++j) {
		next_states[j] = c[j].getNextState(c[j - 1], c[j + 1]);
	    }
	    next_states[number - 1] = c[number - 1].getNextState(c[number - 2], new Cell(mode));
	    for (int j = 0; j < number; ++j) {
		c[j].setState(next_states[j]);
		c[j].draw(g, j * 2, (i + 1) * 2 + 100);
	    }
	    if (!drawn) {
		try {
		    //		    Thread.sleep(50);
		} catch (Exception e) { ; }
	    }
	}
	drawn = true;
    }
    
    public void stop(Graphics g) {
    }
    
    public void destroy(Graphics g) {
    }
    
    public void actionPerformed(ActionEvent e) {
	mode = Integer.parseInt(e.getActionCommand());
	for (int i = 0; i < number; ++i) {
	    c[i].setMode(mode);
	    if (i == number / 2) {
		c[i].setState(true);
	    }
	    else {
		c[i].setState(false);
	    }
	}
	repaint();
    }

}

class Cell {
    private boolean state;
    private int mode = 30;
    
    public Cell(int the_mode) {
	state = false;
	mode = the_mode % 256;
    }
    
    public boolean getState() {
	return state;
    }
    
    public void setState(boolean new_state) {
	state = new_state;
    }
    
    public int getMode() {
	return mode;
    }
    
    public void setMode(int newmode) {
	mode = newmode % 256;
    }
	

    public boolean getNextState(Cell left, Cell right) {
	boolean left_state = left.getState();
	boolean right_state = right.getState();
	
	if (!left_state && !right_state && !state) {
	    return ((mode & 1) > 0);
	}
	else if (!left_state && right_state && !state) {
	    return ((mode & 2) > 0);
	}
	else if (!left_state && !right_state && state) {
	    return ((mode & 4) > 0);
	}
	else if (!left_state && right_state && state) {
	    return ((mode & 8) > 0);
	}
	else if (left_state && !right_state && !state) {
	    return ((mode & 16) > 0);
	}
	else if (left_state && right_state && !state) {
	    return ((mode & 32) > 0);
	}
	else if (left_state && !right_state && state) {
	    return ((mode & 64) > 0);
	}
	else if (left_state && right_state && state) {
	    return ((mode & 128) > 0);
	}
	return false;
    }
    
    public void draw(Graphics g, int x, int y) {
	if (state) {
	    g.drawRect(x, y, 2, 2);
	}
	//	else {
	//	    g.clearRect(x, y, 10, 10);
	//	}
    }
}