Un fractal muy simple

Codigo del Applet

import java.awt.*; 
import java.applet.*; 
 
public class Fractal extends Applet 
{
    public void init()
    {
    	 setBackground(Color.black);
    }
    public void paint(Graphics g) 
    { 
         int x1,y1,x2,y2,l;
         x1=50;
         y1=300;
         x2=0;
         y2=0;
         l=300;
            
         double a,r;
         a=2.1;
         r=.9;
         
         g.setColor(Color.yellow);   
  
         for(int i=0;i<=17537;i++)
         {
         	x2=(int)(x1-(l*Math.cos(a)));
         	y2=(int)(y1-(l*Math.sin(a)));
         	g.drawLine(x1,y1,x2,y2);
		x1=x2;
		y1=y2;		
		a=a+2;			
		l*=r;
	}
        
    }
      
      
}