This is LaMetric TIME Clone for Raspberry PI, implemented with Flutter. You will also need a led screen (preferred 4:1). Follow instruction here to compile --> https://github.com/ardera/flutter-pi
This project also need custom version of spritewidget library to compile --> https://github.com/mboonchai/spritewidget/tree/fix_sprite_box
I'm currently rewriting this project with Flame Engine, see da_pixel