Hi everybody!

I'm trying to realize a little sketch in which second window is opened when space bar is hit. This is my sketch:

1. import controlP5.*;
2. import processing.serial.*;
5. PFrame f;
6. secondApplet s;
7. ControlP5 cp5;
8. Serial serial;
9. Serial myPort;
10. ListBox l;
12. void setup() {
13.   size(320, 240);
14. }
15. void draw() {
16.   background(0, 255, 0);
17.   fill(255);
18. }
19. public class PFrame extends Frame {
20.   public PFrame() {
21.     setBounds(600, 300, 400, 300);
22.     s = new secondApplet();
23.     add(s);
24.     s.init();
25.     show();
26.   }
27. }
28. public class secondApplet extends PApplet {
29.   public void setup() {
30.     size(400, 300);
31.     cp5 = new ControlP5(this);
32.     cp5.addBang("Close")
33.       .setPosition(140, 190)
34.         .setSize(50, 20)
35.           .getCaptionLabel().align(ControlP5.CENTER, ControlP5.CENTER)
36.             ;
37.   }
38.   
39.   public void draw() {
40.     background(255, 0, 0);
41.   }
42. }
45. void keyPressed() {
46.   if (key==' ') {
47.     key=0;
48.     PFrame f = new PFrame();
49.     s.background(0, 0, 255);
50.     s.fill(100);
51.     s.rect(10, 20, frameCount, 0, 10);
52.     s.redraw();
53.   }
54. }
55.   
56. public void Close() {
57.  s.stop();
58. }

As You can observe second window has button called "Close", which should close the window (letting the main window opened), but it does not happen. I would like to know if it's even possible to close the second window by the "x" button in titlebar without close the first one. Can you help me??