const int hijau = 6;
const int kuning = 7;
const int merah = 8;

void setup() {
pinMode(hijau, OUTPUT);
pinMode(kuning, OUTPUT);
pinMode(merah, OUTPUT);
  
}

void loop() {
 digitalWrite(hijau, HIGH);
 digitalWrite(kuning, LOW);
 digitalWrite(merah, LOW);
 delay(10000);

digitalWrite(hijau, LOW);
digitalWrite(kuning, HIGH);
digitalWrite(merah, LOW);
delay (2000);

digitalWrite(hijau, LOW);
digitalWrite(kuning, LOW);
digitalWrite(merah, HIGH);
delay(9000);
}