import processing.opengl.*;
  
  // Used for oveall rotation
  float ang;
  
  // Cube count-lower/raise to test P3D/OPENGL performance
  int limit = 500;
  
  // Array for all cubes
  Cube[]cubes = new Cube[limit];
  
  void setup() {
    size(1024, 768, OPENGL); 
    background(0); 
    noStroke();
  
    // Instantiate cubes, passing in random vals for size and postion
    for (int i = 0; i< cubes.length; i++){
      cubes[i] = new Cube(int(random(-10, 10)), int(random(-10, 10)), 
      int(random(-10, 10)), int(random(-140, 140)), int(random(-140, 140)), 
      int(random(-140, 140)));
    }
  }
  
  void draw(){
    background(0); 
    fill(200);
  
    // Set up some different colored lights
    pointLight(51, 102, 255, 65, 60, 100); 
    pointLight(200, 40, 60, -65, -60, -150);
  
    // Raise overall light in scene 
    ambientLight(70, 70, 10); 
  
    // Center geometry in display windwow.
    // you can change 3rd argument ('0')
    // to move block group closer(+)/further(-)
    translate(width/2, height/2, -200 + mouseX * 0.65);
  
    // Rotate around y and x axes
    rotateY(radians(ang));
    rotateX(radians(ang));
  
    // Draw cubes
    for (int i = 0; i < cubes.length; i++){
      cubes[i].drawCube();
    }
    
    // Used in rotate function calls above
    ang++;
  }