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

public class snake extends Applet
implements Runnable,KeyListener
{
   private int x[];
   private int y[],n,d,m;
   private int board[][];
   private int x0,t,s;
   private int y0,score,level;
   private boolean begin,end,stop; 
   private int x1,y1;
   Button b1;
   Label l1,l2,l3,l4;
   Font f1,f2;   
   Thread a;
   Color color[];
   AudioClip a1,a2;
   public void init()
    {
     a1=getAudioClip(getDocumentBase(),"1.au");
     a2=getAudioClip(getDocumentBase(),"2.au");
     f1=new Font("Helvetica",1,16);
     f2=new Font("Helvetica",1,11);
     color=new Color[10];
     board=new int[40][27];
     color[0]=new Color(0,0,0);
     color[2]=new Color(180,0,0);
     color[1]=new Color(160,80,240);
     color[3]=new Color(80,200,160);
     color[4]=new Color(240,80,160);
     color[5]=new Color(0,180,0);
     color[6]=new Color(180,0,180);
     color[9]=new Color(180,180,0);
     color[8]=new Color(140,140,140);
     color[7]=new Color(200,200,200);
     setLayout(null);
     b1=new Button("Restart");
     add(b1);
     b1.setFont(f1);
     b1.setBackground(color[6]); 
     b1.setForeground(color[5]);    
     b1.setBounds(320,410,100,30);
     l1=new Label();
     add(l1);
     l1.setText("xiangdong wen");
     l1.setFont(f2);
     l1.setBackground(color[7]); 
     l1.setForeground(color[5]);   
     l1.setBounds(450,410,100,15);
     l2=new Label();
l3=new Label();
l4=new Label();

     add(l2);
     l2.setText("wen@math.temple.edu");
     l2.setFont(f2);
     l2.setBackground(color[7]); 
     l2.setForeground(color[5]);   
     l2.setBounds(450,425,140,15);
     
     add(l3);
     l3.setText("LEVEL:"+Integer.toString(level));
     l3.setFont(f1);
     l3.setBackground(color[6]); 
     l3.setForeground(color[5]);   
     l3.setBounds(170,410,120,30);
     add(l4);
     l4.setText("SCORE:"+Integer.toString(score));
     l4.setBackground(color[6]); 
     l4.setForeground(color[5]);   
     l4.setFont(f1);
     l4.setBounds(20,410,120,30);
     a=null;
     randnumber();
     begin();
     addKeyListener(this);
   }  
   
   public void randnumber()
   { x1=(int)(Math.random()*38D)+1;
     y1=(int)(Math.random()*25D)+1;
     if(x1==39)x1=1;
     if(y1==27)y1=1;   
   }
   public boolean action(Event event,Object obj)
   {
      if(event.target==b1)
      {
         begin();
      }
      return true;
   }
   
   private void begin()
   {
      begin=false;
      end=false;
      stop=false;      
      score=0;
      level=1;
      m=100;
      n=1;
      t=250;
      d=3; 
      s=45;     
      y=new int[m];
      x=new int[m];
      x[0]=2;y[0]=14;
      if(a==null){a=new Thread(this);
      a.start();} 
      repaint();
      requestFocus(); 
   }
   
   public void keyTyped(KeyEvent keyevent) {
    }
   public void keyReleased(KeyEvent keyevent) {
    }
   public void run()
   {
     while(!end)
     { 
        if(!stop)Go();
        try{Thread.sleep(t);}
        catch(InterruptedException _EX){}
     }
   }
   public void snake()
   {}
   public void update(Graphics g)
   {paint(g);
   }
	public void paint(Graphics g)
	{
	   int i,j;  
	   if(!begin)
	   {g.setColor(color[0]);
	      g.fillRect(15,15,570,375);
	      g.setColor(color[7]);
	      g.fillRect(0,405,600,450);
         g.setColor(color[1]);
      for( j=0;j<27;j++)
      {
         g.fill3DRect(0*15,j*15,15,15,true);
         g.fill3DRect(39*15,j*15,15,15,true);
      }
      for( j=0;j<40;j++)
      {
        
         g.fill3DRect(j*15,0*15,15,15,true);
         g.fill3DRect(j*15,26*15,15,15,true);
      }

	      	      begin=true;
	   }
	   
	   
	   g.setColor(color[0]);
      g.fill3DRect((x[n])*15,(y[n])*15,15,15,true);
      g.setColor(color[3]);
      for( i=0;i0;i--)
      {
         x[i]=x[i-1];y[i]=y[i-1];   
      }
      x[0]+=x0;y[0]+=y0; 
      if(x[0]==x1&&y[0]==y1)
      {  
         a1.play();
         n=n+1;
         score+=100; 
         l4.setText("SCORE:"+Integer.toString(score));
         level=(int)(score/300)+1;
         l3.setText("LEVEL:"+Integer.toString(level));
         t=250-level*20;
         randnumber();
      }
      if(x[0]==0||x[0]==39||y[0]==0||y[0]==26)
      {   stop1();
      }
      for(int i=1;i