PImage bg1;
PImage bg2;
Pixels[] px = new Pixels[9];

void setup(){
 // bg1 = loadImage("bg1.jpg");
 // bg2 = loadImage("bg2.png");
}



public class Pixels extends Thread {
    // Constructor, create the thread
    // It is not running by default
    public Pixels (float pSize, float pX, float pY, float pOpacity, float pSpeed, int pBehave){
    }
 public void start ()
    {
        // Do whatever start does in Thread, don't forget this!
        super.start();
    }
 public void run ()
    {
      if(pBehave == 1){
        while (pSize < 6){
            pSize = pSize + pSpeed;
            rect(pX,pY,pSize,pSize);
            // Ok, let's wait for however long we should wait
            try {
                sleep((long)(1));
            }
            catch (Exception e) {
            }
              if(pSize >= 6){
              pBehave = 2;
            }
        }}else{
            pSize = pSize - pSpeed;
            rect(pX,pY,pSize,pSize);
            // Ok, let's wait for however long we should wait
            try {
                sleep((long)(1));
            }
            catch (Exception e) {
            }
        }

        // The thread is done when we get to the end of run()
    }
    // Our method that quits the thread
  public void quit()
    {
        System.out.println("Quitting.");
        running = false;  // Setting running to false ends the loop in run()
        interrupt(); // in case the thread is waiting. . .
    }
}

void draw(){
  background(0);
 // image(bg1,0,0);
  for(int i = 0; i < 9; i = i + 1){
px[i] = new Pixels(random(2,6),random(20,780),random(20,155),0,random(0.1,0.8),1);
  px[i].start();
  }
}