import processing.dxf.*;
  boolean record = false;
  
  void setup() {
    size(400, 400, P3D);
    noStroke();
    sphereDetail(12);
  }
  
  void draw() {
    if (record == true) {
      beginRaw(DXF, "output.dxf"); // Start recording to the file
    }
    lights();
    background(0);
    translate(width / 3, height / 3, -200);
    rotateZ(map(mouseY, 0, height, 0, PI));
    rotateY(map(mouseX, 0, width, 0, HALF_PI));
    for (int y = -2; y < 2; y++) {
      for (int x = -2; x < 2; x++) {
        for (int z = -2; z < 2; z++) {
          pushMatrix();
          translate(120*x, 120*y, -120*z);
          sphere(30);
          popMatrix();
        }
      }
    }
    if (record == true) {
      endRaw();
      record = false; // Stop recording to the file
    }
  }
  
  void keyPressed() {
    if (key == 'R' || key == 'r') { // Press R to save the file
      record = true;
    }
  }