code for hooking up two potentiometers to my spinning shapes code

spin_serial.java

import processing.serial.*;     // import the Processing serial library
Serial myPort;                  // The serial port

int squareCount = 0;
int circleCount = 0;
SquareSpin[] square = new SquareSpin[300];
CircleSpin[] circle = new CircleSpin[300];

float xpos, ypos;

void setup() { 
  size(662, 662);
 for (int a = -320; a <= 320; a = a + 40) {
  for (int b = -320; b <= 320; b = b + 40) {
    square[squareCount] = new SquareSpin(a, b);
    squareCount++;
  }
 }

 for (int c = -320; c <= 320; c = c + 40) {
  for (int d = -320; d <= 320; d = d + 40) {
    circle[circleCount] = new CircleSpin(c, d);
    circleCount++;
  }
 } 
 
 String portName = Serial.list()[0];
  myPort = new Serial(this, portName, 9600);
  myPort.bufferUntil('\n');
 
}

void draw() {
 background(#F5E5C0);
 pushMatrix();
 translate(width/128, height/128);
 
 int f = 0;
 int j = 0;
 
 float x = map(xpos, 0, 1023, 7, 70);
 float y = map(ypos, 0, 640, 7, 70);
 
  while (f < squareCount) {
   square[f].go();
   square[f].show();
   square[f].updateSize(x);
   f++; 
 }

 while (j < circleCount) {
   circle[j].go();
   circle[j].show();
   circle[j].updateSize(y);
   j++;
 }
popMatrix();
}

void serialEvent(Serial myPort) { 
  // read the serial buffer:
  String myString = myPort.readStringUntil('\n');
  if (myString != null) {
    println(myString);
  }
  
  myString = trim(myString);

    // split the string at the commas
    // and convert the sections into integers:
    int sensors[] = int(split(myString, ','));
    
    // print out the values you got:
    for (int sensorNum = 0; sensorNum < sensors.length; sensorNum++) {
      print("Sensor " + sensorNum + ": " + sensors[sensorNum] + "\t"); 
    }
    // add a linefeed after all the sensor values are printed:
    println();
    
    // make sure there are three values before you use them:
 if (sensors.length > 1) {
      xpos = sensors[0];
      ypos = sensors[1];
      // the switch values are 0 and 1.  This makes them 0 and 255:
    }
}

class Spin {
  float speed = random(-0.05, 0.05);
  float angle = 0;
  float d = 20;
  int x, y;
  
  Spin(int xpos, int ypos) {
    x = xpos;
    y = ypos; 
  }
  
  void go() {
    angle += speed;
  }
  
  void updateSize(float size) {
    d = size;
  }
}

class SquareSpin extends Spin {
  SquareSpin(int x, int y) {
    super(x, y);
  }
   void show() {
    pushMatrix();
    translate(((width/2)+x), ((height/2)+y));
    rotate(angle);
    rectMode(CENTER);
    noStroke();
    fill(#3F5666, 200);
    rect(x/128, y/128, d, d);
    popMatrix();
  }
}

class CircleSpin extends Spin {
  CircleSpin(int x, int y) {
    super(x, y);
  }
   void show() {
    pushMatrix();
    translate(((width/2)+x), ((height/2)+y));
    rotate(angle);
    ellipseMode(CORNER);
    noFill();
    strokeWeight(2);
    stroke(#DEB51E);
    ellipse(x/128, y/128, d, d);
    popMatrix();
  }
}