// 22.11.4562 - Muhammad Guido Augusta
int ledMerah  = 2;
int ledKuning  = 3;
int ledHijau  = 4;
int i = 0;

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

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledHijau, HIGH);

  while(1){
  digitalWrite(ledMerah, HIGH);
  delay(1000);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledKuning, HIGH);
  delay(1000);
  digitalWrite(ledKuning, LOW);
  }
}