float cnt;

void setup() {
  size(300,300);
  ellipseMode(CENTER_DIAMETER);
  rectMode(CENTER_DIAMETER);
  smooth();
}

void loop() {

  background(200);
  translate(width/2,height/2);

  
  rotateX(radians(45+cnt));
  rotateY(radians(45+cnt/2));

  fill(255);
  drawbox(0,0,0, 50);
  drawbox(-100,0,0, 20);
  drawbox(0,-100,0, 20);
  drawbox(100,0,0, 20);
  drawbox(0,100,0, 20);

  fill(200,50,0);
  drawbox(0,0,-100, 20);
  drawbox(0,0,100, 20);
  
  cnt++;
 }

void drawbox(float x,float y, float z, float rad) {
  push();
  translate(x,y,z);
  scale(rad);
  box(0.5);  
  box(1, 0.2, 0.2);  
  pop();
}