write arduino code for ultrasonic sensor and led

//Declare variables
int ledPin = 13;
int sensorPin = 0;

void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int val = analogRead(sensorPin);
  if(val > 500){
    digitalWrite(ledPin, HIGH);
  }else{
    digitalWrite(ledPin, LOW);
  }
  Serial.println(val);
}