Write a Multithreading program in java using Runnable interface to move text on the frame as follow

import java.awt.*;
import java.awt.event.*;
class MoveText extends Frame implements Runnable
{
    Label l1;
    Thread t;
    int x,y,side;
    public MoveText()
    {
        setLayout(null);
        l1=new Label("Sachin ");
        l1.setFont(new Font("",Font.BOLD,14));
        l1.setForeground(Color.red);
        setSize(400,400);
        setVisible(true);
        t=new Thread(this);
        t.start();
        x=5;
        y=200;side=1;
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent we)
            {
                System.exit(0);
            }
        });
    }
    public void run()
    {
        try        {
            if(side==1)
            {
                t.sleep(50);
                l1.setBounds(x+=5,y-=5,70,15);
                add(l1);
                26                if(y==20)
                    side=2;
            }
            if(side==2)
            {
                t.sleep(50);
                l1.setBounds(x+=5,y+=5,70,15);
                add(l1);
                if(y==200)
                    side=3;
            }
            if(side==3)
            {
                t.sleep(50);
                l1.setBounds(x-=5,y+=5,70,15);
                add(l1);
                if(y==390)
                    side=4;
            }
            if(side==4)
            {
                t.sleep(50);
                l1.setBounds(x-=5,y-=5,70,15);
                add(l1);
                if(x==0)
                {
                    side=1;
                    x=0;y=200;
                }
            }
        }catch(Exception e)
        {
            System.out.println(e);
        }
        run();
    }
    public static void main(String args[])
    {
        new MoveText();
    }
    27}