Binary Kitchen timer ATtiny424

I wanted to play with the new ATtiny424 which happens to have a built in 32768hz oscillator. So decided to build a binary kitchen timer. I have some mini Christmas tree's (made with attiny10) and thought a building would go good with it. You can set it from 1 to 15 minutes. Its nice and loud.

The schematics and code and build is here:

https://www.shermluge.com/electronics/attiny424/attiny424-binary-kitchen-timer-internal-clock

Enjoy