import java.awt.*;
public  class MyFrame extends Thread
{
	public void run()
	{
		while(true)
		{
		  cl.previous(p);
		  try
		  {
		  	Thread.sleep(1000);
		}catch(Exception e){}
		}
	}
	static Panel p=new Panel();
	static CardLayout cl=new CardLayout();
	public static void main(String[] args)
	{
		Frame f=new Frame("my first frame!");
		f.setSize(300,400);
		f.setLocation(200,100);
		f.setBackground(Color.yellow);
		f.setLayout(new BorderLayout(5,10));
		TextField tf=new TextField();
		Button[] brr=new Button[30];
		for(int i=0;i<brr.length;i++)
		{
			brr[i]=new Button(""+i);
		}
		
		p.setLayout(cl);
		for(int i=0;i<brr.length;i++)
		{
			p.add(brr[i],""+i);
		}
		//Button bt=new Button("exit");
		f.add(tf,BorderLayout.NORTH);
		f.add(p,BorderLayout.CENTER);
		//MyFrame1 f=new MyFrame1("my second frame");
		f.setVisible(true);
		MyFrame mf=new MyFrame();
		mf.start();
	}
}