interrupt buttons, code stops running sometimes

Projects Programming
5

m3phisto23:
i am not familiar with debouncing a button yet - is this something that can help here?

The simplest way to do that is to ignore button presses that happen close together - say within 50 millisecs.

Try this

void changeEffect() {
  if (millis() - lastButtonPressMillis >= 50) {
     lastButtonPressMillis = millis();
     buttonPushCounter++;
     buttonPushCounter2 = 0;
  }
}

If you use a RISING interrupt you will know that the button is HIGH

...R