#include <Servo.h>
int trigpin = 3;
int echopin = A0;
int time;
int distance;
Servo myservo;
void setup() {
  // put your setup code here, to run once:
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  myservo.attach(11);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(trigpin, LOW);
  digitalWrite(trigpin, HIGH);
  time = pulseIn(echopin, HIGH);
  distance = time * 0.0172;

  if (distance>30)
{

  myservo.write(90);
  
}

else
{

  myservo.write(0);

}
}