Full automatic timer [16 min][Countdown bell]

Hey im working on a full automatic timer that goes up to 16 min.

This is my first huge redstone project so feel free to give hints or anykind of info ill hope to finish it soon but so far so good i dont have any complications at the moment :D

I also uploaded few pictures of how it looks (This pictures can be outdated) so would you like to support then pls hit the diamond button and leave a comment well ill keep working on it if its done ill upload world save

To do:

- Add decoder

- Add timer

- Add Display

- Reset button

- Add random redstone to make it look harder then it is

- Add small control panel