Help me draw a flowgraph for this code

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package com.mtala

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t

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snake

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d;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics

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D;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

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$$@author Mohammed.Talaat

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mtala

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t

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$$

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$$@version

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$.$

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$$

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public class MainScreen extends JFrame implements ActionListener

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$$private static final long serialVersionUID

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$-$

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$$JRadioButton levels

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$$new JRadioButton

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;

$$String levelStrings

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$"$Easy$",$ "Normal", "Hard"

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;

$$MainScreenPanel buttonPanel

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$$null;

$$public MainScreen

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$$ buttonPanel

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$$new MainScreenPanel

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$$ setDefaultCloseOperation

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JFrame

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EXIT

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ON

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CLOSE

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$$ setBounds

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;

$$ setResizable

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false

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;

$$ buttonPanel.setBackground

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Color

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BLACK

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;

$$ for

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int i

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$$ levels

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i

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$$new JRadioButton

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levelStrings

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i

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;

$$ levels

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i

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addActionListener

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this

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;

$$ levels

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i

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setBackground

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Color

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YELLOW

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$$ levels

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i

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setBounds

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$$ buttonPanel.add

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levels

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i

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;

$$

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$$ buttonPanel.setLayout

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null

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;

$$ getContentPane

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add

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buttonPanel

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;

$$ setVisible

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true

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;

$$

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$$public void actionPerformed

$($

ActionEvent e

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$$ Object obj

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$$e

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getSource

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;

$$ if

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obj

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$$levels

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$0$

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$$ new GameBoardWindow

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$1$

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;

$$ setVisible

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false

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;

$$ dispose

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$)$

;

$$

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$$ if

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obj

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$$levels

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$1$

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$\{$

$$ new GameBoardWindow

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$2$

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;

$$ setVisible

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false

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;

$$ dispose

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$)$

;

$$

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$$ if

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obj

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$$levels

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$$ new GameBoardWindow

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;

$$ setVisible

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false

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;

$$ dispose

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$)$

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$$

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$$

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$$@SuppressWarnings

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$"$

serial

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$$class MainScreenPanel extends JPanel

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$$ MainScreenPanel

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$)$

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$$

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$$ public void paintComponent

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Graphics g

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$$ super.paintComponent

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g

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;

$$ Graphics

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D g

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$($

Graphics

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$$g;

$$ g

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setColor

$($

Color

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RED

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;

$$ g

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setFont

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new Font

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$"$

Comic Sans MS

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$,$

$$Font$.$BOLD,

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$)$

$)$

;

$$ g

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drawString

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$"$

Snake

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$)$

;

$$ g

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setColor

$($

Color

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ORANGE

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;

$$ g

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drawString

$($

$"$

mtala

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$5$

$0$

$)$

;

$$

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$$

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$\}$