void setup() {
  // Deklarasi pin LED
const int ledMerah=7;
const int ledKuning=5;
const int ledHijau=3;
const int ledBiru=2;
} 

void loop() {
  // Inisialisasi pin sebagai output
pinMode(7, OUTPUT);
pinMode(5, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(7, HIGH);
digitalWrite(5, LOW);
digitalWrite(3, LOW);
digitalWrite(2, LOW);
delay(300);
digitalWrite(7, LOW);
digitalWrite(5, HIGH);
digitalWrite(3, LOW);
digitalWrite(2, LOW);
delay(300);
digitalWrite(7, LOW);
digitalWrite(5, LOW);
digitalWrite(3, HIGH);
digitalWrite(2, LOW);
delay(300);
digitalWrite(7, LOW);
digitalWrite(5, LOW);
digitalWrite(3, LOW);
digitalWrite(2, HIGH);
delay(300);



}