import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import javax.swing.*; public class Canvas extends JPanel { private Main parent; //*1 Saves pointer to parent public Canvas (Main parent) { this.parent = parent; //*1 } public void paintComponent (Graphics g) { //*2 Redraws circle for current frame number super.paintComponent(g); g.drawOval ( //*2 // Moves by 2 pixels on each frame 10 + 2 * parent.getFrameNumber(), //*3 Call parent to find current frame number 10 + 2 * parent.getFrameNumber(), //*3 // size 100, 100); } }