#include <Servo.h>
Servo myservo;
const int trig = 8;
const int echo = 11;
int duration = 0;
int distance = 0;
void setup(){
  pinMode(echo, INPUT);
  pinMode(trig, OUTPUT);
  myservo.attach(9);
  Serial.begin(9600);
}
void loop(){
  digitalWrite(trig, HIGH);
  delayMicroseconds(1000);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);
  distance = (duration/2 /28.5);
  Serial.println(distance);
  if(distance<=100){
    myservo.write(180);
  }else{
    myservo.write(90);
  }
}