#include <Servo.h>
Servo myservo;
const int servoPin = 3;
const int trigPin = 5;
const int echopin = 6;

void setup(){
	pinMode(trigPin, OUTPUT);
	pinMode(echopin, OUTPUT);
	myservo.attach(servoPin);
	Serial.begin(9600);
}
void loop(){
	digitalWrite(trigPin,LOW);
	delay(2000);
	digitalWrite(trigPin,HIGH);
	delay(10000);
  digitalWrite(trigPin,LOW);
  long duration = pulseIn(echopin,HIGH);
  long data=(duration);
  int distance = duration*0.034/2;
  Serial.println(data);

  if(distance<100)
  {
    myservo.write(180);
  }
  else if(distance<200)
  {
    myservo.write(90);
  }
  else{
    myservo.write(0);
  }
}