import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;

class InsertHaHa implements Runnable {
	Document d;
	InsertHaHa(Document d){
		this.d = d;
	}
	public void run(){
		int start = d.getStartPosition().getOffset();
		while(true){
			try{
				Thread.sleep(3000);
				d.insertString(start, "HaHa", null);
			}catch(Exception ignore){};
		}
	}
}