const int pinA = 7; // Assuming physical pin 7 of ATtiny1614 maps to logical pin 2 in megaTinyCore
const int pinB = 6; // Assuming physical pin 6 maps to logical pin 1 in megaTinyCore
const int ledPin = 3; // LED connected to logical pin 3 (check your pin mapping)

volatile bool turned = false;

void setup() {
  pinMode(pinA, INPUT_PULLUP);
  pinMode(pinB, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  // Using Pin Change Interrupts for ATtiny1614
  attachInterrupt(digitalPinToInterrupt(pinA), rotaryTurned, CHANGE);
}

void loop() {
  if (turned) {
    digitalWrite(ledPin, HIGH);
    delay(5000); // Delay keeps the CPU busy; consider using a timer for non-blocking delay
    digitalWrite(ledPin, LOW);
    turned = false;
  }
}

void rotaryTurned() {
  turned = true;
}