Dokończenie kodu do rysowania Java Swing

Question

Hej, stanąłem w martwym punkcie a do oddania projektu dzielą mnie 3 godziny. Macie pomysł jak skończyć to co zapoczątkowałem ? Czyli jak rysować 3 losowe kształty w losowych kolorach i położeniach i dodawać je do listy (którą później trzeba odtworzyć w drugim oknie) ?? Jeżeli ktoś ma pomysł byłbym bardzo wdzięczny bo ten projekt spędza mi sen z powiek... Dodaje to co mam:

public class Main {

    public static void main(String[] args) {
        new Frame();
    }
}

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;

public
    class Frame extends JFrame implements Runnable {

        public  ArrayList<Shape> shapesList = new ArrayList<>(30);

        public double width = getWidth();
        public double height = getHeight();

    public  Rectangle myRect;
    public  Oval myOval;
    public  Line myLine;

    public Frame()
        {

            super("I do not need title, just 50%");
            setSize(800,600);
            setDefaultCloseOperation(3);
            setLocationRelativeTo(null);
            setVisible(true);

            Thread t0 = new Thread(this);
            t0.start();
        }

    /*@Override
    public  void paint(Graphics g) {
        super.paint(g);
        for (Shape shape : shapesList) {
            // Graphics g = (Graphics) g.create();
            g.fillRect(((int)(getWidth()*Math.random()*0.8d)),((int)(getHeight()*Math.random()*0.8d)), (int) (myRect.x2),(int) myRect.y2);
            g.dispose();
        }
    }
    */

        @Override
        public void run() {

            while (true) {
                try {

                    Random rand = new Random();
                    switch (rand.nextInt(3)+1) {
                        case 1:
                            shapesList.add((Shape)myRect);
                            break;

                        case 2:
                            shapesList.add((Shape)myOval);
                            break;

                        case 3:
                            shapesList.add((Shape)myLine);
                            break;
                    }

                    repaint();
                    Thread.sleep(1000);

                } catch (Exception e) {
                    System.out.println(e.getMessage());
                }
            }
        }


}

import javax.swing.*;
import java.awt.*;
import java.util.Random;

public abstract
        class MyShape extends JFrame {

    public  double x1;
    public  double x2;
    public  double y1;
    public  double y2;
    public  Color color;
    public  Random random;

    public  Rectangle myRect;
    public  Oval myOval;
    public  Line myLine;

    @Override
    public void paint(Graphics g) {
    }
    // tutaj metoda rysuj
}

import java.awt.*;
import java.util.Random;

public
    class Line extends MyShape {

    public void paint(Graphics g)
    {
        g.setColor(myLine.color);
        g.drawLine(((int)(getWidth()*Math.random()*0.8d)),((int)(getHeight()*Math.random()*0.8d)), (int) (myRect.x2),(int) myRect.y2);
    }

    public Line()
    {

        random = new Random();

        x1 = (getWidth() * (Math.random() * 0.8d));
        y1 = (getHeight()* (Math.random() * 0.8d));
        x2 = Math.random() * 100;
        y2 = Math.random() * 100;
        color = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));

    }
}

import java.awt.*;
import java.util.Random;

public
    class Oval extends MyShape {

    public void paint(Graphics g)
    {
        g.setColor(myOval.color);
        g.fillOval(((int)(getWidth()*Math.random()*0.8d)),((int)(getHeight()*Math.random()*0.8d)), (int) (myRect.x2),(int) myRect.y2);
    }

    public Oval()
    {

        random = new Random();

        x1 = (getWidth() * (Math.random() * 0.8d));
        y1 = (getHeight()* (Math.random() * 0.8d));
        x2 = Math.random() * 100;
        y2 = Math.random() * 100;
        color = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));
    }

}

import java.awt.*;
import java.util.Random;

public
    class Rectangle extends MyShape {

    public void paint(Graphics g)
    {
        g.setColor(myRect.color);
        g.fillRect(((int)(getWidth()*Math.random()*0.8d)),((int)(getHeight()*Math.random()*0.8d)), (int) (myRect.x2),(int) myRect.y2);
    }

    public Rectangle()
    {

        random = new Random();

        x1 = (getWidth() * (Math.random() * 0.8d));
        y1 = (getHeight()* (Math.random() * 0.8d));
        x2 = Math.random() * 100;
        y2 = Math.random() * 100;
        color = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));

    }

}