#define ledMerah 3
#define ledKuning 2
#define ledIjo 1

void setup() {
  // put your setup code here, to run once:
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledIjo, OUTPUT);
}

void flipflop() {
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledKuning, LOW);
  digitalWrite(ledIjo, LOW);
  delay(4000);
  digitalWrite(ledMerah, HIGH);
  digitalWrite(ledKuning, HIGH);
  digitalWrite(ledIjo, LOW);
  delay(1000);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledKuning, HIGH);
  digitalWrite(ledIjo, LOW);
  delay(3000);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledKuning, LOW);
  digitalWrite(ledIjo, HIGH);
  delay(4000);
}

void loop() {
  // put your main code here, to run repeatedly:
  flipflop();
}