#include<Servo.h>
Servo myservo;

int trigPin = 9;
int echoPin = 10;
long duration;
int distance;
int led = 13;

void setup() {
    myservo.attach(11);
  pinMode (13, OUTPUT);
  pinMode (trigPin, OUTPUT);
  pinMode (echoPin, INPUT);
  Serial.begin(9600);
 
}

void loop() {
  digitalWrite(trigPin,LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);

  duration = pulseIn(echoPin, HIGH);
  distance = (0.034*duration)/2;

  if (distance <= 100) {
    digitalWrite(13, HIGH);
  }
  else{
     digitalWrite(13, LOW);
  }
    if(distance<=50){

myservo.write(90);
  }
else{
myservo.write(0);}

  Serial.print("distance:");
  Serial.println(distance);
  delay(1);
   
  }