Balancing Tetris Dice

I made the dice of [hecvel23](https://www.thingiverse.com/hecvel23/designs)'s [Balancin Tetris](https://www.thingiverse.com/thing:5854425) to have imprints of the original Tetris pieces (we only use those).
If we roll the blank side, the player has free choice.

Enjoy!