int ledPin = 13;
int inputPin = 2;
int pirState = LOW;
int val = 0;
int pinSpeaker = 10;



void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(pinSpeaker, OUTPUT);
  Serial.begin(9600); // put your setup code here, to run once:
}

void loop() {
  val = digitalRead(inputPin);
  if (val == HIGH) {
    digitalWrite(ledPin, HIGH);
    playTone(300, 160);
    delay(150);
    if (pirState == LOW);{
    Serial.println("Motion detected!");

    pirState = HIGH;
    }
  } else {
    playTone(0,0);
    delay(300);
    if (pirState == HIGH) {
      Serial.println("Motion ended!");
      pirState = LOW;
    }
  }
}

void playTone(long duration, int freq){

  duration *= 1000;
  int period = (1.0 / freq) * 1000000;
  long elapsed_time = 0;
  while (elapsed_time < duration) {
    digitalWrite(pinSpeaker, HIGH);
    delayMicroseconds(period / 2);
    digitalWrite(pinSpeaker, LOW);
    delayMicroseconds(period / 2);
    elapsed_time += (period);
  }
}
  // put your main code here, to run repeatedly: