chrom3D

PGraphics cubeA, cubeB;
float theta, alphaA, alphaB,sz;
int frames = 240;

void setup() {
  size(500, 500, P3D);
  //smooth(8);
  cubeA = createGraphics(250, 250, P3D);
  cubeB = createGraphics(250, 250, P3D);
  background(0);
}

void draw() {
  background(0);
  drawCubeA();
  drawCubeB();
  alphaA = map(sin(theta), -1, 1, 50, 255);
  alphaB = map(sin(theta+PI), -1, 1, 50, 255);
  sz = map(sin(theta), -1, 1, .5, 1);
  for (int x=0; x<width; x+=cubeA.width) {
    for (int y=0; y<height; y+=cubeA.height) {
      tint(255, alphaA);
      image(cubeA, x, y);
      tint(255, alphaB);
      image(cubeB, x, y);
    }
  }
  theta += TWO_PI/frames;
  //if (frameCount<=frames) saveFrame("image-###.png");
}

void drawCubeA() {
  cubeA.beginDraw();
  cubeA.lights();
  cubeA.background(0);
  cubeA.noStroke();
  //cubeA.fill(255,0,0);
  cubeA.pushMatrix();
  cubeA.translate(cubeA.width/2, cubeA.height/2);
  cubeA.rotateX(theta*2);
  cubeA.rotateY(theta*1);
  cubeA.box(cubeA.width*.5);
  cubeA.popMatrix();
  cubeA.endDraw();
}

void drawCubeB() {
  cubeB.beginDraw();
  cubeB.lights();
  cubeB.background(0);
  cubeB.noStroke();
  //cubeB.fill(255,255,0);
  cubeB.pushMatrix();
  cubeB.translate(cubeB.width/2, cubeB.height/2);
  cubeB.rotateX(PI+theta*1);
  cubeB.rotateY(theta*2);
  cubeB.box(cubeB.width/2);
  cubeB.popMatrix();
  cubeB.endDraw();
}