Applet see nothing

Question

Hello
I can see nothing after the applet started... only a blue screen. Can somebody tell me where is the problem? It must draw a tree...but i can see only a blue screen
Thank you!
Regards
import java.awt.*;
import java.applet.*;
public class Lindenmayer extends Applet{
     Point a,b;
     int lengthF=3; //pas
     double direction;
     double rotation=30.0;
     Graphics g;
     Graphics2D g2;
     public void init(){
          setBackground(new Color(200,255,255));
     public void paint(Graphics g){
          g2=(Graphics2D) g;// anti aliasing
          g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                                   RenderingHints.VALUE_ANTIALIAS_ON);
          g2.setColor(new Color(255,0,255));
          a=new Point(200,495); 
          direction=-60;         //dir start
          turtle(g2,"F",5);
     public void turtle(Graphics g2, String instruc, int depth){
          if(depth==0) return;
          depth-=1;
          Point aMark=new Point(0,0);
          double directionMark=0;
          char c;
          for(int i=0;i<instruc.length();i++)
               c=instruc.charAt(i);
               if(c=='F')
                    turtle(g2,"F[+F]F[-F]F",depth);
                    if(depth==0)
                         double rad=2.0*Math.PI*direction/360.0;
                         int p=(int)(lengthF*Math.cos(rad));
                         int q=(int)(lengthF*Math.sin(rad));
                         b=new Point(a.x+p,a.y+q);
                         a=b;
               else if(c=='+') direction+=rotation;
               else if(c=='-') direction-=rotation;
               else if(c=='[') {aMark=a; directionMark=direction;}
               else if(c==']') {a=aMark; direction=directionMark;}
}

Answer 1

You don't know how to draw? Read the javadoc for [Graphics2D|http://java.sun.com/javase/6/docs/api/java/awt/Graphics2D.html] and you'll find the drawLine method.
Kaj