useCodeBreathing.tsx

useCode(
    () => [
      cond(and(not(breathing), clockRunning(clock)), stopClock(clock)),
      cond(
        and(not(not(breathing)), not(clockRunning(clock))),
        startClock(clock)
      ),
      set(animation, [
        loop({
          duration: 5000,
          clock: clock,
          easing: Easing.inOut(Easing.ease),
          boomerang: true,
          autoStart: false,
        }),
      ]),
    ],
    [animation, breathing]
  );