#define RED 27 //mendeklarasi pin 27
#define YELLOW 26 //mendeklarasi pin 26
#define GREEN 25 //mendeklarasi pin 25

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(RED, OUTPUT); //mode pin untuk output
  pinMode(YELLOW, OUTPUT); //pin mode untuk output
  pinMode(GREEN, OUTPUT); //pin mode untuk output
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(RED, HIGH);
  for (int i = 0; i < 4; i++) { //untuk perulangan led kuning
    digitalWrite(YELLOW, HIGH);
    delay(500);
    digitalWrite(YELLOW, LOW);
    delay(500);
  }
  digitalWrite(RED, LOW);
  digitalWrite(YELLOW, LOW);

  digitalWrite(GREEN, HIGH);
  delay(4000);
  digitalWrite(GREEN, LOW);
}