clock type about flutter_clock

[josephchenghmlet]

It can also be in binary clock!

[jkurtw]

From the FAQ at https://flutter.dev/clock

Does the clock have to show the time?
The viewer should be able to tell the time. Whether that be with digits, clock hands, a sundial shadow, or colors flashing in Morse code, there should be some way for a user to reliably determine the time. (It’s OK if telling the time requires some thinking.)

So, you can do whatever you want as long as there is some way to derive time :-)