import java.awt.*;
import java.util.*;

public class Fern {
   
    public static final int LENGTH = 500;
    public static final int WIDTH = 500;
    public static final int RADIUS = 1;
   
    public static void main(String[] args) throws InterruptedException{
	int x = 5;
      
	// painters canvas
	DrawingPanel p = new DrawingPanel(WIDTH, LENGTH);
	// paint brush
	Graphics g = p.getGraphics();
      
	fernGame(g, 2000000);
    }
   
    public static void fernGame(Graphics g, int iter) {
	double x = 0;
	double y = 0;
	g.setColor(Color.GREEN);
	for (int i = 0; i < iter; i++) {
	    double tmpx, tmpy;
	    double r = Math.random();
         
	    if (r <= 0.01) {
		tmpx = 0;
		tmpy = 0.16 * y;
            
            
	    } else if (r <= 0.08) {
		tmpx = 0.2 * x - 0.26 * y;
		tmpy = 0.23 * x + 0.22 * y + 1.6;
            
	    } else if (r <= 0.15) {
		tmpx = -0.15 * x + 0.28 * y;
		tmpy = 0.26 * x + 0.24 * y + 0.44;
            
	    } else {
		tmpx = 0.85 * x + 0.04 * y;
		tmpy = -0.04 * x + 0.85 * y + 1.6;
	    }
	    x = tmpx;
	    y = tmpy;
         
	    g.fillOval((int) Math.round(WIDTH / 2 + x * WIDTH / 11),
		       (int) Math.round(LENGTH - y * LENGTH / 11), RADIUS, RADIUS);
	}
    }
}