how to make button move in a sigle row

Check it out and say cheese

You had used many unwanted things ,
Always try to make the code as simple as possible

import java.awt.*;
import java.applet.*;
import javax.swing.*;
/*<applet code="fi.class" width="300" height="400"></applet>*/
public class fi extends Applet implements Runnable
{
    Button b[] = new Button[1];
    int x1=0;
    Thread t;
    public void init()
    {
        setLayout(new FlowLayout());
        b[0] = new Button();
        add(b[0]);
        setBackground(Color.blue);
    }
public void start()
    {    
        t = new Thread(this);
        t.start();
    }
public void run()
    {

    try    
        {
            for(;;)
            {
                repaint();
                
                x1=(x1+3)%200;
                b[0].setLocation(x1,100);
                Thread.sleep(1000);
            }
        }
        catch(Exception e){}
    }


}

Thanks goyal for your coding

actually i want to set the size of button so i have used paint method here.
actually i am practicing many things in a single code thats why many unnecessary things are left.
Here i found my mistake just i have to use the break statement.

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


public class fi extends Applet implements Runnable
{
Button b[] = new Button[1];
int x1=0;
Thread t;
public void init()
{
for(int i=0;i<1;i++)
{
setLayout(new FlowLayout());
b = new Button();
add(b);
}
}
public void start()
{
t = new Thread(this);
t.start();
}
public void run()
{
Thread t1=Thread.currentThread();
while(t==t1)
{

try
{
repaint();
Thread.sleep(1000);
setBackground(Color.blue);
}
catch(Exception e){}
}
}
public void paint(Graphics g)
{
for (int j=0;j<1;j++)
{
b[j].setSize(15,6);
x1=(x1+3)%200;
b[j].setLocation(x1,100);
break;
}

}
}
/*<applet code="fi.class" width="300" height="400"></applet>*/