#include <Servo.h>
int servoPin = 3;
Servo Servol;
const int trigPin = 9;
const int echoPin = 10;
long duration;
int distance;
void setup() {
  Servol.attach(servoPin);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(9600);
}

void loop() {
 //clears the trigPin
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);;
digitalWrite(trigPin, HIGH); 
delayMicroseconds(10);;
digitalWrite(trigPin, LOW);
duration=pulseIn(echoPin,HIGH);
distance=duration*0.034/2; 
Serial.print("Distance:");
Serial.println(distance);

if (distance<=6){
  Servol.write(0);
}
else if (distance<=6){
  Servol.write(180);
}
}