const int merah=1;
const int kuning=2;
const int hijau=4;
const int hijau2=17;
const int kuning2=18;
const int merah2=19;

void setup() {
  // put your setup code here, to run once:
pinMode(merah,OUTPUT);
pinMode(kuning,OUTPUT);
pinMode(hijau,OUTPUT);
pinMode(merah2,OUTPUT);
pinMode(kuning2,OUTPUT);
pinMode(hijau2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(merah,HIGH);
digitalWrite(hijau2,HIGH);
delay (1000);
digitalWrite(hijau2,LOW);
digitalWrite(merah,LOW);
digitalWrite(kuning,HIGH);
digitalWrite(kuning2,HIGH);
delay (1000);
digitalWrite(kuning2,LOW);
digitalWrite(kuning,LOW);
digitalWrite(hijau,HIGH);
digitalWrite(merah2,HIGH);
delay (1000);
digitalWrite(hijau,LOW);
digitalWrite(merah2,LOW);



}