Hello, I'm new to programming and processing. Not sure if this is a silly question. I would be very grateful if anyone can helpppp?

What I am trying to do is have one wiimote adding random circles to a screen and one wiimote subtracting the random circles from the screen. I have got both wiimotes talking to processing and have one creating circles, I am stuck on trying to remove them with the other controller..... Here is the code.....





import oscP5.*; // imports OpenSoundControl libraries, these are used to allow the WiiMote to talk to Processing
import netP5.*;

WiiRemote wiiRemote; // imports WiiRemote class
WiiRemoteII wiiRemoteII; //imports second wiimote class
ArrayList balls; //imports ball class as an array


void setup()
{
 size (screen.width, screen.height); // sets window size to full screen
 frameRate(30); // sets frame rate to 30 fps
 noStroke(); // removes lines from around objects
 smooth(); // ensures object curves are smooth
 background(0); // sets background colour as black
 wiiRemote = new WiiRemote(); // creates new WiiRemote object
 wiiRemoteII = new WiiRemoteII(); // creates second remote object
 balls = new ArrayList(); // creates new ball array

}


void draw()
{
 float x = random(1,width);
 float y = random(1,height);

 float bounce2 = ((wiiRemoteII.acc.x + wiiRemoteII.acc.y + wiiRemoteII.acc.z)/3.0)-100;
 float bounce = ((wiiRemote.acc.x + wiiRemote.acc.y + wiiRemote.acc.z)/3.0)-100;



 if(bounce < 10.0 || bounce > 40.0)
 {
   balls.add(new Ball(x,y,30));
 }


 int del = int(random(balls.size()));


 for (int i = balls.size()-1; i >= 0; i--) {
   Ball ball = (Ball) balls.get(i);

   if (bounce2 < 10.0 || bounce2 > 40.0)
   {
     balls.remove(del);
   }
   println(del);
 }

 }

 void mousePressed()
 {
 background(0);
 }



class Ball
{
 float x,y;
 color c;
 float mass = 10.0;


 Ball(float inx, float iny, float inmass)
 {
   x = inx;
   y = iny;
   mass = inmass;
   
   c = color(random(255), random(255), random(255));
   fill(c);
   ellipse(x,y,mass,mass);
 }

}

Thats amazing, I'm such an idiot.

Thank you very much!!