#define LED_BIRU 19
#define LED_MERAH 18
#define LED_KUNING 5
#define BUTTON_PIN 15

void setup() {
  pinMode(LED_BIRU, OUTPUT);
  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
}

void loop() {
  if (digitalRead(BUTTON_PIN) == HIGH) {
    digitalWrite(LED_BIRU, HIGH);
    delay(1000);
    digitalWrite(LED_BIRU, LOW);
    delay(100);
    digitalWrite(LED_MERAH, HIGH);
    delay(1000);
    digitalWrite(LED_MERAH, LOW);
    delay(100);
    digitalWrite(LED_KUNING, HIGH);
    delay(1000);
    digitalWrite(LED_KUNING, LOW);
    delay(100);
  }
  else {
  }
}