add scrollpane to panel which has another panel in it

Question

I have a panel drawSomething to draw something in it and I need its size to be big and I have another panel in my frame to put that panel drawSomething in it so, I need to put scrollpane around panel how can I do it?

here is my sample code :

import java.awt.Color;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;


public class myFrame extends JFrame{

    public static void main(String[] args) {
        myFrame mf = new myFrame();
        mf.setSize(400,400);
        mf.setVisible(true);
        mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mf.setLayout(null);

        JPanel panel1 = new JPanel();
        panel1.setBackground(Color.yellow);
        JPanel drawSomething = new JPanel();
        panel1.setBounds(100, 100, 200, 200);
        drawSomething.setSize(500, 500);
        drawSomething.setBackground(Color.BLACK);

        panel1.add(drawSomething);
        JScrollPane scroll = new JScrollPane(panel1);
        mf.add(scroll);

    }
}