ColorTimer - Multiple theme

The colorful timer uses a variety of color combinations, along with multiple cartoon themed pattern options, up to 70 main images, and the appearance of a random hourglass, giving the timing process a new experience and a pleasant mood.

---Main functions---
1. Support adding multiple countdown items, each of which can choose a different floating island theme and come with a special hourglass
2. Up to dozens of cartoon floating island themed images can be randomly switched, and each timing has a different experience
3. At the beginning of the timing, the floating island animation will be activated, making the mood happy during the timing process
4. Support lock screen timing, allowing users to use other apps while timing, making it easy to understand the remaining time of the timer