#include <Servo.h>
Servo myservo;

int ledPin = 12;                
int pirPin = 13;
int buzzer = 11;
int pirStat = 0;                   
int pos = 0;

void setup() {
 pinMode(ledPin, OUTPUT); 
 pinMode(buzzer, OUTPUT);
 pinMode(pirPin, INPUT);
 myservo.attach(9); 
 Serial.begin(9600);
 myservo.write(pos); 
}

void loop(){
 
  pirStat = digitalRead(pirPin); 
  if (pirStat == HIGH){            
   digitalWrite(ledPin, HIGH);
    digitalWrite(buzzer, HIGH);
   
   Serial.println("Motion Detected");

   for (pos = 0; pos <= 180; pos += 1) { 
    myservo.write(pos);              
    delay(30);                       
   } 
   digitalWrite(ledPin, LOW);
    digitalWrite(buzzer, LOW);
    for (pos = 180; pos >= 0; pos -= 1) { 
    myservo.write(pos);              
    delay(30);                       
   }
 } 
 else {
   
 }
}