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import java.awt.*;
import javax.swing.*;
class MyDrawPanel extends JPanel{
public void paintComponent(Graphics g){
Graphics2D g2d = (Graphics2D) g;
int myRed = (int)(Math.random() * 255);
int myGreen = (int)(Math.random() * 255);
int myBlue = (int)(Math.random() * 255);
Color startColor = new Color(myRed,myGreen,myBlue);
myRed = (int)(Math.random() * 255);
myGreen = (int)(Math.random() * 255);
myBlue = (int)(Math.random() * 255);
Color endColor = new Color(myRed,myGreen,myBlue);
GradientPaint gradient = new GradientPaint(70,70,startColor,150,150,endColor);
g2d.setPaint(gradient);
g2d.fillOval(70,70,100,100);
}
}