import java.awt.*;

public class spots extends java.applet.Applet {

final int MAXSPOTS=10;
   int xspots[]=new int[MAXSPOTS];
   int yspots[]=new int[MAXSPOTS];
   int currspots=0;

   public void init() {
      setBackground(Color.white);
   }

   public boolean mouseDown(Event evt, int xm, int ym) {
      if (currspots<MAXSPOTS) addspot(xm,ym);
      else System.out.println("Too many spots.");
      return true;
   }

   void addspot(int xm, int ym) {
      xspots[currspots]=xm;
      yspots[currspots]=ym;
      currspots++;
      repaint();
   }

   public void paint(Graphics g) {
      g.setColor(Color.blue);
      for (int j=0; j<currspots; j++) {
	g.fillOval(xspots[j]-10,yspots[j]-10,20,20);
      }
   }
}