void setup() {
  // put your setup code here, to run once:
}

void loop() {
 
  // Mainkan nada pada buzzer
  tone(33, 261.6);  
  delay(1000);  
  tone(33, 293.7);  
  delay(1000);  
  tone(33, 329.6);  
  delay(1000);  
  tone(33, 349.2);  
  delay(1000);  

  // Matikan buzzer
  noTone(33);
  delay(1000);  
}