#include <Servo.h>

Servo myservo;

const int trigPin=11;
const int echoPin=13;
long duration;
int distance;
int safetyDistance;
int buf=4;


int pir=7;           // digital pin for pir motion sensor


void setup()

{

  pinMode(pir,INPUT);

  myservo.attach(8);  // digital pin for servo motor
  pinMode(trigPin,OUTPUT);
  pinMode(echoPin,INPUT);
  pinMode(buf,OUTPUT);
  

  Serial.begin(9600);

}


void loop()

{

  int x = digitalRead(pir);

  Serial.println(x);

  if(x==HIGH)

{

    myservo.write(180);

     delay(3000);

  }

 

  else{

   

    myservo.write(-200);

   

  }

 

 
digitalWrite(trigPin,LOW);
delayMicroseconds(2);
digitalWrite(trigPin,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,LOW);
duration = pulseIn(echoPin,HIGH);
distance=duration*0.035/2;
safetyDistance = distance;
if(safetyDistance<=5){
   myservo.write(250);
   digitalWrite(buf,HIGH);

   delay(1000);
}
else{
    myservo.write(-200);
     digitalWrite(buf,LOW);
}
 digitalWrite(buf,HIGH);
  }