const int trigPin = 18;
const int echoPin = 5;
const int LED1 = 15;
const int LED2 = 2;

#define PIEZO_PIN 16
long duration;
int distance;
void setup() {
pinMode(PIEZO_PIN, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
   pinMode(LED1 , OUTPUT);
  pinMode(LED2 , OUTPUT);

Serial.begin(9600);
}

void loop() 
{
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance= duration*0.034/2;
  Serial.print("Mesafe: ");
  Serial.println(distance);
  if (distance < 10) {
    tone(PIEZO_PIN, 1500);
    delay(200);
    noTone(PIEZO_PIN);
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
  }
  else
  {
     digitalWrite(LED1, LOW);
    digitalWrite(LED2, HIGH);
  
  }
}