int pir=3;
int led=2;
int buzzer=4;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(pir, INPUT);
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int pirvalue=digitalRead(pir);
  if(pirvalue==HIGH){
    Serial.println("Motion Detected");
    digitalWrite(led,HIGH);
    tone(buzzer, 2000);   
  }
  else{
     Serial.println("No Motion");
      digitalWrite(led,LOW);
      noTone(buzzer);    
  }
  delay(500);

}