Re-sizable Target Java Paint

Java 2D
#1

I need this target for an interface I’m working on… It has to re-size and have several rings of alternating colors. I was able to get 1 circle that resizes but am unsure how to make more circles(obviously smaller and to some sort of ratio to make a target). I tried making another g.fillOval with different values but it wasn’t making the target like pattern I wanted. Thanks in advance!

package target;



import java.awt.*;

import javax.swing.*;

import java.applet.*;




public class Target extends JPanel			//Setting up a graphics window
{
	
	public Target()
	{
		setBackground(Color.BLACK);  	//Color constant 
		setPreferredSize(new Dimension(250,250));
	}
	
	public void paintComponent(Graphics g)
	{
		 
	           Dimension d = getSize();
	           int x = d.width/2;
	           int y = d.height/2;
	           int radius = (int) ((d.width < d.height) ? 0.4 * d.width : 0.4 * d.height);
	           
		 int width = getWidth();        // width of window in pixels
	     int height = getHeight();      // height of window in pixels
	     

	     super.paintComponent(g);       // call superclass to display the panel
	     
	     
	     //Drawing code below
	     
	     
         g.setColor(Color.cyan);
         g.fillOval(x-radius, y-radius, 2*radius, 2*radius);
         //Here is where I'm not sure! If I do another g.fillOval, I have no clue what i'd change the values to be.

   
         
         
	     
	}
	
	
	
	public static void main(String[] args)
    {
        Target panel = new Target();           // window for drawing
     
        JFrame application = new JFrame();           // the program itself
        
        application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   // set frame to exit when it is closed
        application.add(panel);           

        application.setTitle("Target Program");
        application.setSize(500, 500);  // window is 500 pixels wide, 400 high
        application.setVisible(true);          
    }


}