#define ECHO_PIN 3

#define TRIG_PIN 2

#define pinBuzzer 5

#include <Servo.h>

Servo myservo;

int rotasi 90;

int interval = 0;

float readDistanceCM(){

 digitalWrite(TRIG_PIN, LOW); delayMicroseconds(10);

 delayMicroseconds(2); digitalWrite(TRIG_PIN, HIGH);

 digitalWrite(TRIG_PIN, LOW);

 int duration = pulseIn (ECHO_PIN, HIGH) 
 return duration 0.034/2;

}

void soundBuzzer(){ 
  if(interval< 500){ 
    tone(pinBuzzer, 250);

  }else
  if(interval 500) { 
    tone (pinBuzzer, 100, 800);
  };

}