This sample code is for Control Servo and Display Sensor's Reading with the GUI on Arduino's Tutorial. [Arduino]

ServoUltrasonic.ino

#include <Servo.h>       // Include the Servo library 
int servoPin = 3;       
const int trigPin = 9;
const int echoPin = 10;
Servo myServo;           // Create a servo object
int val = 0;
long duration;
int distance;

void setup() {
  myServo.attach(servoPin);
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT);  // Sets the echoPin as an Input
  Serial.begin(9600);       //start serial
}

void loop() {

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);  // Reads the echoPin, returns the sound wave travel time in microseconds
  distance = duration * 0.017;        // Calculating the distance
  Serial.println(distance);
 
  if (Serial.available()) {           //Check data

    int val = Serial.read();
    myServo.write(val);
    delay(15);


  }
}