#include<Servo.h>

int LedPin = 7;
int trigPin = 4;
int echoPin = 2;
int ServoPin = 9;
int position = 0;
int delayT = 15;
String msg02 = "Detection Found sagor";
String msg01 = "No Detection Found";

Servo myServo;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(LedPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(trigPin, OUTPUT);
myServo.attach(ServoPin);

Serial.println(msg01);
}

void loop() {
  // put your main code here, to run repeatedly:
int distance;
int duration;

digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin,HIGH);
distance = duration*0.0344/2;

if (distance <= 50){
   digitalWrite(LedPin, HIGH);
   Serial.println(msg02);
}else if (distance > 50){
   digitalWrite(LedPin, LOW);
   Serial.println(msg01);
}
   for(position=0;position<=180;position++){
   myServo.write(position);
   delay(delayT);
}
   for(position=180;position>=0;position--){
   myServo.write(position);
   delay(delayT);
}