import java.awt.*;

import java.applet.*;
// copyright, M Paez, 1999, U of Antioquia, r Landau OSU


public class Tree extends Applet {

  double mxx,myy,bxx,byy;



  public void Treeplot(Graphics g)

  {

    int i,max,seed;

    int pex,pey,k;

    double x,y,r,xn,yn;

    max=30000;

    seed=6811;

    x=0.5;                 /* initial position */

    y=0.0;

    k=1;

    coormundo(-0.8,1.8,0.8,0.0);

    setBackground(Color.black);

    g.setColor(Color.green);

    for(i=1 ; i<=max; i++)

    {

      r=Math.random();

      if (r<=0.1)

      { 

         xn = 0.05*x;

         yn = 0.6*y;

      }

      else if((r>0.1) && (r<0.2))

      { 

         xn  = 0.05*x;

         yn  = -0.5*y+1.0;

      }

      else if ((r>0.2) && (r<0.4))

      {

         xn  = 0.46*x-0.32*y;

         yn  = 0.39*x+0.38*y+0.6;

      }  

      else if((r>0.4) && (r<0.6))

      {

         xn  = 0.47*x-0.15*y;

         yn  = 0.17*x+0.42*y+1.1;

      }

      else if ((r>0.6) && (r<0.8))

      {

         xn  = 0.43*x+0.28*y;

         yn  = -0.25*x+0.45*y+1.0;

      }  

      else 

      {

         xn  = 0.42*x+0.26*y;

         yn  = -0.35*x+0.31*y+0.7;

      }  

      x = xn;

      y = yn;

      pex=(int)(mxx*x+bxx);

      pey=(int)(myy*y+byy);

      g.drawLine(pex,pey,pex,pey);

      if((i%3000)==0){

        g.setColor(Color.red);

        g.fillOval(120-k,200-k,2+k,2+k);

        k=k+1;

       }

       if(i<28000)g.setColor(Color.green);

       if((i>28000)&&(i<29000))g.setColor(Color.yellow);

       if(i>29000)g.setColor(Color.orange);

   }

 }

 void coormundo(double xiz,double ysu,double xde,double yinf)

   {

    double maxx,maxy,xxfin,xxcom,yyin,yysu;

    maxx=600;

    maxy=450;

    xxcom=0.15*maxx;

    xxfin=0.75*maxx;

    yyin=0.8*maxy;

    yysu=0.2*maxy;

    mxx=(xxfin-xxcom)/(xde-xiz);

    bxx=0.5*(xxcom+xxfin-mxx*(xiz+xde));

    myy=(yyin-yysu)/(yinf-ysu);

    byy=0.5*(yysu+yyin-myy*(yinf+ysu));

  }

  public void paint(Graphics g)

  {

    Treeplot(g);

    g.setColor(Color.white);

    g.fillOval(500,30,50,50);

    g.setColor(Color.black);

    g.fillOval(512,23,50,50);

    showStatus("Done");

  }



}