float a;                          // Angle of rotation
float offset = PI/180;             // Angle offset between boxes
int num = 30;                     // Number of boxes
color[] colors = new color[num];  // Colors of each box


boolean green = true;

void setup() 
{ 
  size(700, 300, P3D);
  noStroke();  
  frameRate(30);
  for(int i=0; i<num; i++) {
    colors[i] = color(700 * (i+1)/num, 700 * (num-i)/num, 200);
  }
  lights();
} 
 

void draw() 
{     
  background(3, 40, 26);
  
      
  translate(width/2, height/2, -20);
  a+=0.04;
  if(a >= TWO_PI*2) { 
    a = 0.0; 
  }    
  for(int i=0; i<num; i++) {
    pushMatrix();
    fill(colors[i]);
    rotateY(a/8+offset*i);
    rotateX(a+offset*i);
    box(width/2);
    popMatrix();
  }
}