#include <Servo.h>

const int trigPin= 10;
const int echoPin = 11;

long duration;
int distance;
Servo myServo;

void setup() {
  // put your setup code here, to run once:
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(9600);
  myServo.attach(12);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int i=15; i<=165;i++){
    myServo.write(i);
    delay(30);
    distance = calculateDistance();

    Serial.print(i);
    Serial.print(", ");
    Serial.print(distance);
    Serial.print(".");
  }

  for(int i=165;i>15;i--){
    myServo.write(i);
    delay(30);
    distance = calculateDistance();
    Serial.print(i);
    Serial.print(",");
    Serial.print(distance);
    Serial.print(".");
  }
}

int calculateDistance(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration*0.034/2;
  return distance;
}