#define led_merah 8
#define led_biru 10
#define led_ungu 9
#define bunyi 4

void setup() {
  // put your setup code here, to run once:
  pinMode(led_merah, OUTPUT);
  pinMode(led_biru, OUTPUT);
  pinMode(led_ungu, OUTPUT);
  pinMode(bunyi, OUTPUT);

  digitalWrite(led_merah, LOW);
  digitalWrite (led_biru, LOW);
  digitalWrite (led_ungu, LOW);
  tone(bunyi, 2000, 500);
  delay (3000);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite (led_merah, HIGH);
  digitalWrite (led_biru, LOW);
  digitalWrite (led_ungu, LOW);
  tone (bunyi, 2000, 500);
  delay (2000);

  digitalWrite (led_merah, LOW);
  digitalWrite (led_biru, HIGH);
  digitalWrite (led_ungu, LOW);
  delay (2000);
  
  digitalWrite (led_merah, LOW);
  digitalWrite (led_biru, LOW);
  digitalWrite (led_ungu, HIGH);
  delay (2000);


}