while (true) {
  reboot();
  if (checkbox('alpha')) {
    alpha(0.75);
  } else {
    alpha(1);
  }
  circle();
  transform(0, [2, 2], [0, 0]);
  for (let i = 0; i < 8; i++) {
    render();
    wrap(i % 2 == 0);
  }
  await frame();
}
