Im new to this forum, and quite new to processing. I have tried to animate this simple animation in 10 different ways, with no success when it comes to best performance. Frame rate drops heavy when i render Square Object that moves and grows every few seconds. I thought somehow java's garbage collector forgets about the previously instantiated objects but it seems not.  Please tell me how to efficiently render such trivial example.  PLS hlp. I need to keep drawing such square to the music beats or sth. and this will simply not work. 

public class Taaa extends PApplet {

public class Square {

      public int x; 

      public int y; 

      public int w; 

      public int h;

      public float o;

      public int size; 

      public PApplet PAPP = Taaa.PAPP;

      public boolean fadeOut = false;

      public boolean fadeIn = false;

      public boolean display = false;

      public boolean moveLeft = false;

      public int kwadraton;

      int i = 0;

     

       public Square(int x, int y, int w, int h, int o){

      this.x = x; 

      this.y = y; 

      this.w = w; 

      this.h = h;

      this.o = o;

      PAPP.registerDraw(this);

      }

      public void fadeOut(){

            this.o = this.o - 5f;

      }

      public void fadeIn(){

            this.o = this.o + 3f;

      }

      public void moveLeft(){

            this.x = this.x + 10;

      }      

      public void setOpacity(float val){

            this.o = val;

      }

      public float getOpacity(){

            return this.o;

      }

      public void addCol(){

            w = w+1;

      }

      public void addRow(){

            h = h+1;

      }

      public void draw(){

            if(fadeOut == true){

                  fadeOut();

      }

      if(fadeIn == true){

            fadeIn();

      }

      if(moveLeft == true){

            moveLeft();

      }

      if(addRow == true){

            addRow();

      }

      if(addCol == true){

            addCol();

      }

   displaySquare();

      i++;

      }

      public void displaySquare(){

            PAPP.fill(255,250,250,o);

            for(int i = 0; i < w; i++){

                  for(int j = 0; j < h; j++){

                      //PAPP.fill(this.o,110,10,200);

                        PAPP.rect(x+10*i, y+10*j, w,h);

                  }

            }

      }

      public void moveLeft(int val){

            this.x = this.x - val;

      }

      public void moveRight(int val){

            this.x = this.x + val;

      }

      public void moveDown(int val){

            this.y = this.y + val;

      }

       public void moveUp(int val){

            this.y = this.y - val;

      }

}