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

public class ex3 extends BufferedApplet
{
   int w = 0, h, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
   int count = 0;
   int X[] = new int[1000];
   int Y[] = new int[1000];
   int n = 0;
   Random R = new Random();

   public void render(Graphics g) {
      if (w == 0) {
	 w = bounds().width;
	 h = bounds().height;
	 x1 = w / 2;
	 y1 = h / 2;
	 x2 = w / 2;
	 y2 = h / 2;
      }

      g.setColor(Color.white);
      g.fillRect(0, 0, w, h);

      g.setColor(Color.black);
      for (int i = 0 ; i < n-1 ; i++) {
	 //double theta = (R.nextInt() > 0 ? 1 : -1) * Math.sin(i * count * .001);
	 double theta = .1 * Math.sin(i * count * .001);
	 int dx = (int)(100 * Math.cos(theta));
	 int dy = (int)(100 * Math.sin(theta));
	 //g.drawLine(X[i] + dx, Y[i] + dy, X[i+1] + dx, Y[i+1] + dy);
	 g.fillOval(X[i] + dx - 10, Y[i] + dy - 10, 20, 20);
      }

      count++;

      animating = true;
   }

   public boolean mouseDown(Event e, int x, int y) {
      count = 0;
      n = 0;
      X[n] = x;
      Y[n] = y;
      damage = true;
      return true;
   }

   public boolean mouseDrag(Event e, int x, int y) {
      n++;
      X[n] = x;
      Y[n] = y;
      damage = true;
      return true;
   }

   public boolean mouseUp(Event e, int x, int y) {
      n++;
      X[n] = x;
      Y[n] = y;
      damage = true;
      return true;
   }
}