int ledPin = 13;
int inputPin = 2;
int pirState = LOW;
int val = 0;

void setup() {
  pinMode (ledPin, OUTPUT);
  pinMode (inputPin, INPUT);

  Serial.begin(9600);
}

void loop () {
  val = digitalRead(inputPin);
  if (val == HIGH) {
    digitalWrite(ledPin, HIGH);
    if (pirState == LOW) {
      Serial.println("Gerakan Tedekksi! ");
      pirState = HIGH;
    }
  } else {
    digitalWrite( ledPin, LOW);
    if (pirState == HIGH) {
      Serial.println("Tidak Ada Gerakan!");
      pirState = LOW;
    }
  }
}