//inisialisasi pin
int ledDelay = 10000;
int redPin = 10;
int yellowPin = 9;
int greenPin = 8;

void setup() {
  pinMode (redPin, OUTPUT);
  pinMode (yellowPin, OUTPUT);
  pinMode (greenPin, OUTPUT);
}

void loop() {
  //lampu merah hidup selama 10 detik
  digitalWrite(redPin, HIGH);
  delay (ledDelay);

  //lampu kuning hidup selama 2 detik
  digitalWrite(yellowPin, HIGH);
  delay (2000);
  
  //lampu hijau hidup, lampu merah dan kuning mati
  //nerlangsung selama 10 detik
  digitalWrite(greenPin, HIGH);
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, LOW);
  delay(ledDelay);

  //lampu kuning hidup dan lampu hijau mati
  //berlangsung selama 2 detik
  digitalWrite(yellowPin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(2000);

  //lampu kungin mati
  digitalWrite(yellowPin, LOW);

  // kembali ke program awal
}