import java.awt.*;

public class myCanvas extends Canvas implements Runnable {

 ballObject Blue = new ballObject();
 ballObject Red = new ballObject();
 ballObject Green = new ballObject();
// volatile Thread blinker;
 Thread runThread = new Thread();
 boolean first, east, west, north, south, pause;
 int Xpos, Ypos;

 Color black = new Color(0, 0, 0);
 Color red = new Color(255, 0, 0);
 Color blue = new Color(0, 0, 255);
 Color green = new Color(0, 128, 0);

 myCanvas() {

  first = true;
  repaint();
 
   Red.Xpos = 70;
   Red.Ypos = 50;
   Red.east = true;
   Red.south = true;
   Red.incEast = 1;
   Red.incSouth = 3; 
   Red.pause = false;

   Blue.Xpos = 50;
   Blue.Ypos = 30;
   Blue.west = true;
   Blue.north = true;
   Blue.incWest = 4;
   Blue.incNorth = 5;
   Red.pause = false;

   Green.Xpos = 110;
   Green.Ypos = 50;
   Green.west = true;
   Green.south = true;
   Green.incWest = 8;
   Green.incSouth = 10;
   Green.pause = false;

  new Thread(this).start();

 } // myCanvas

public void run() {

  while(true) {
   try {
     Thread.sleep(50);
   } catch (Exception e) {};


   repaint();

  } // while

 } // run

 public void runRed() {
     Red.pause = false;
     return;


     } //start Red

 public void haltRed() {
     Red.pause = true;
     return;

        }  // end stop Red
  

 public void start() {
  runThread = new Thread(this);
  runThread.start();
 } //start


 public void paint(Graphics g) {

  g.setColor(black);
  g.drawRect(9, 9, 200, 200);

  g.setColor(red);
  Red.position();
  g.fillOval(Red.Xpos, Red.Ypos, 20, 20);

  g.setColor(blue);
  Blue.position();
  g.fillOval(Blue.Xpos, Blue.Ypos, 20, 20);

  g.setColor(green);
  Green.position();
  g.fillOval(Green.Xpos, Green.Ypos, 20, 20);

 } // paint

} // class myCanvas