Revert "Update matrix.py"
Revert "Update matrix.py"

This reverts commit 1b9a166e7de1a8ad8ad536c64ffd000a1e08cc31.

xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino,xbed/Mixly_Arduino