import java.awt.Frame;

PFrame f;
SecondApplet s;

void setup() {
  size(320, 240);
  s = new SecondApplet();
  f = new PFrame(s);
}

void draw() {
  background(255, 0, 0);
  frame.setLocation(100, 100);
  fill(255);
  rect(10, 10, frameCount, 10);
  s.background(0, 0, 255);
  s.fill(100);
  s.rect(10, 20, frameCount, 10);
  s.redraw();
}

public class PFrame extends Frame {
  public PFrame(PApplet PApp) {
    setBounds(200, 200, 400, 300);
    add(PApp);
    PApp.init();
    show();
  }
}

public class SecondApplet extends PApplet {
  public void setup() {
    size(400, 300);
    noLoop();
  }

  public void draw() {
  }
}