#include <Servo.h>
Servo myservo;

#define TRIG_PIN 9
#define ECHO_PIN 10

int servoPin = 3;

long duration;
int distance;

void setup() {
  myservo.attach(servoPin);
  pinMode(ECHO_PIN, INPUT);
  Serial.begin(9600);
}


void loop() {
  // Clears the TRIG_PIN
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  duration = pulseIn(ECHO_PIN , HIGH);
  distance = duration/58.2;
  Serial.print("Distance: "); 
  Serial.println(distance);

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

  delay(300);

}