const int pirPin = 2;

int activationCount = 0;

void setup() {

   pinMode(pirPin, INPUT);

   Serial.begin(9600);

}

void loop() {

  if (digitalRead(pirPin) == HIGH) {

      activationCount++;

      Serial.print("Activations: ");

      Serial.println(activationCount);

      delay(5000);

  }

}