//  Definisikan pin LED dan pin Buzzer const
 	int blueLED = 13; const
	int greenLED = 12; const
	int redLED = 11; const
	int buzzer = 10; 
  
void setup() { 
//  Atur pin-pin sebagai output
    pinMode(redLED, OUTPUT);
    pinMode(blueLED, OUTPUT);
    pinMode(greenLED, OUTPUT); 
    pinMode(buzzer, OUTPUT); 
}  
  
void loop() { 
   // Urutan 1: LED Merah    
   digitalWrite(redLED, HIGH);    
   digitalWrite(blueLED, LOW);    
   digitalWrite(greenLED, LOW);    
   tone(buzzer, 1000);// Bunyikan buzzer    
   delay(1000); // Tunggu 1 detik 
    
   // Urutan 2: LED Merah dan LED Biru    
   digitalWrite(redLED, HIGH);    
   digitalWrite(blueLED, HIGH);    
   digitalWrite(greenLED, LOW);    
   noTone(buzzer); // Matikan bunyi buzzer 
   delay(1000); // Tunggu 1 detik 
 
   // Urutan 3: LED Biru dan LED Hijau 
   digitalWrite(redLED, LOW); 
   digitalWrite(blueLED, HIGH); 
   digitalWrite(greenLED, HIGH);
   noTone(buzzer); // Matikan bunyi buzzer
   delay(1000); // Tunggu 1 detik 
    
   // Urutan 4: LED Hijau dan LED Merah
   digitalWrite(redLED, HIGH);
   digitalWrite(blueLED, LOW);
   digitalWrite(greenLED, HIGH);
   tone(buzzer, 1000); // Bunyikan buzzer
   delay(1000); // Tunggu 1 detik 
}