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colorbox.pde

RollingBox box3d;
float counter;

void setup(){
  size(500, 800, P3D);
  box3d = new RollingBox();
  counter = 0;
  frameRate(60);
}

void draw(){
  background(0);
  box3d.rotate3d(width/2,height/2,counter);
  counter += 1;
}

class RollingBox {
  float angle = 0;
  color c = color(0,0,0);
  float boxSize = 100;
  int plus;
  RollingBox () {
    angle=0;
    boxSize = 300;
    plus = 0;
  }
  void rotate3d(int xpos,int ypos, float counter){
    translate(xpos, ypos, 0); 
    rotateY(angle);
    if((counter % 2) == 0){
       boxSize -= 3;
    }else{
      boxSize += 3;
    }
    
    if((counter % 30) == 0){
      c = randomColor();
     
    }
    box(boxSize); 
    
    
    fill(c);
    
    angle += 0.03;
    if(angle == 360){
      angle = 0;
    }
  }
  
  private color randomColor(){
    color c = color(random(255),random(255),random(255));
    return c;
  }
  
}