Box recursion box/sphere/ico

mySketch
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let n, tam, maxtam;
n = 10;
let rx = 0,
  ry = 0,
  rz = 0;
let rodar = false;
let poly = 0;
let clique = false;
let ico;
​
function preload() {
  ico = loadModel('polyhedronisme-C300u2I.obj');
}
​
function setup() {
  tam = [window.innerWidth, window.innerHeight];
  maxtam = max(...tam);
​
  createCanvas(tam[0], tam[1], WEBGL);
  angleMode(DEGREES);
}
​
function draw() {
  let aux = clique * 255;
  background(aux);
  switch (poly) {
    case 0:
      fill(aux)
      stroke(!clique * 255);
      strokeWeight(1);
      break;
​
    case 1:
      noStroke();
      specularMaterial(!clique * 255);
      ambientLight(127);
      pointLight(50, 50, 50, 0, 0, maxtam / n);
      break;
​
    case 2:
      fill(aux)
      stroke(!clique * 255);
      strokeWeight(0.3);
      break;
  }
  orbitControl();
​
  if (!rodar) {
    if (rotationX * rotationY * rotationZ != 0 && rotationX * rotationY * rotationZ != null) {
      rodar = true;
    }
  }
​
  if (rodar) {
    rz = rotationZ;
    rx = rotationX;
    ry = rotationY;
  } else {
    ry = map(mouseX, 0, tam[0], 0, -360);
    rx = map(mouseY, 0, tam[1], 0, -180);
  }
​
  translate(0, 0, 2*sin(3*frameCount) / n*maxtam);
  rotateZ(rz);
  rotateX(rx);
  rotateY(ry);
​
  for (let i = 0; i < n; i++) {
    for (let j = 0; j < n; j++) {
      for (let k = 0; k < n; k++) {
        push();
        let px = map(i, 0, n - 1, -0.5 * maxtam, 0.5 * maxtam);
        let py = map(j, 0, n - 1, -0.5 * maxtam, 0.5 * maxtam);
        let pz = map(k, 0, n - 1, -0.5 * maxtam, 0.5 * maxtam);
​
        translate(px, py, pz);
        switch (poly) {
          case 0:
            box(maxtam / (n - 1) / 10);
            break;
​
          case 1:
            sphere(maxtam / (n - 1) / 20, 16, 8);
            //sphere(maxtam / (n - 1) / 20, 4, 2);
            break;
​
          case 2:
            scale(5);
            model(ico);
            break;
        }
​
        pop();
      }
    }
  }
}
​
function mouseClicked() {
  clique = !clique;
  if (!clique) {
    poly++;
    if (poly > 2) {
      poly = 0;
    }
  }
}