Talko counter with Mario piezo greeter firmware for Ginkosynthese Grains Eurorack Module.
More info on the module:

https://www.ginkosynthese.com/product/586901/grains-diy-kit
https://www.modulargrid.net/e/ginko-synthese-grains-new-panel
https://nurdspace.nl/Grains

This firmware is basically Talko counter firmware as found on:
https://www.polaxis.be/download/polaxis-talko-counter-for-ginko-synthese-grains/

But with a little gimmick.
When a piezo buzzer is added to the Arduino Nano, the module will greet you with a little tune when powered up.
Code for the tune is a heavily stripped down version of the code found on:
http://www.linuxcircle.com/2013/03/31/playing-mario-bros-tune-with-arduino-and-piezo-buzzer/

Without the buzzer the module will function just fine.