[G4P] Issue with new Window

Hello.

I have a problem with the drawHandler of a new window created with G4P. The window is created when a button is pressed, this is where the window is created and its drawHandler:

void createWindow(){
  window = GWindow.getWindow(this, "Label", 400, 400, 400, 400, JAVA2D);
  window.addDrawHandler(this, "windowDraw");
  window.setActionOnClose(G4P.CLOSE_WINDOW);
}

public void windowDraw(PApplet appc, GWinData data){

  if(frameCount%50 == 0 && frames < 15){
      appc.fill(random(x,y), random(x,y), random(x,y), random(x,y));
      appc.noStroke();
      appc.ellipse(random(0,400), random(0,400),a, a);
  }
}

(a is a mapped value, originally from a rms-analysis, frames is variable that counts up every 50 frames) So the problem is, that it doesn't draw only one circle, but a seemingly random amount of circles every 50 frames. I hope somebody can help me with this. If you need more code, for better understanding let me know.

thanks in advance raiu