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

public class Mandel_Finder extends Applet{
 double aa=2.0,xx=0.0,yy=0.0;
 public void paint(Graphics g){
  int hx,hy;
  double a=aa/4;
  double x=0.0-xx;
  double y=0.0-yy;
  double zr,zi,z,p,r,hz;
  for(double j=-1.0/a+y;j<1.0/a+y;j=j+0.005/a){
   for(double i=-1.0/a+x;i<1.0/a+x;i=i+0.005/a){
    hx=(int)(200-200*x*a+i*200*a);
    hy=(int)(200-200*y*a+j*200*a);
    hz=(int)(Math.round((1000/3)*(Math.log(a))/(Math.log(10))+500));
    zr=0;zi=0;
    for(int k=0;k<=hz;k++){
     z=zr*zr-zi*zi+i;
     p=2*zr*zi+j;
     r=z*z+p*p;
     if(r>=4&&k<=hz){
      g.setColor(new Color((int)(125*Math.round(Math.sin(15*3.14*(k*3-90)/180)+1)),
                           (int)(125*Math.round(Math.sin(15*3.14*k*3/180)+1)),
                           (int)(125*Math.round(Math.sin(15*3.14*(k*3+90)/180)+1))));
      g.fillRect(hx,hy,1,1);
      break;
     }else if(r<4&&k==hz){
      g.setColor(new Color(0,0,0));
      g.fillRect(hx,hy,1,1);
      break;
     }
     zr=z;zi=p;
    }
   }
  }
 }
 public boolean mouseDown(Event e,int dx,int dy){
  xx=(200-dx)/(aa*100)+xx;
  yy=(200-dy)/(aa*100)+yy;
  aa=aa+aa;
  repaint();
  return true;
 }
}