// library
// variabel



void setup() {
//Program yang di jalankan saat pertama kali arduino dijalankan
//Program hanya dijalankan satu kali
//Berisi tentang setting dan pengaturan parameter
 pinMode(8, OUTPUT);
digitalWrite(8, LOW);
pinMode(2, OUTPUT);
digitalWrite(2, LOW);
pinMode(7, OUTPUT);
digitalWrite(7, LOW);
pinMode(4, OUTPUT);
digitalWrite(4,LOW);

}

void loop() {
  //Program yang dijalankan secara terus menerus
digitalWrite(8, HIGH);   
  delay(500);                       
  digitalWrite(8, LOW); 
  delay(500);
  digitalWrite(2, HIGH); 
  delay(500);
  digitalWrite(2, LOW);
  delay(500);
 digitalWrite(7, HIGH);
 delay(500);
 digitalWrite(7, LOW);
 delay(500);
 digitalWrite(4, HIGH);
 delay(500);
  digitalWrite(4, LOW);
  delay(500);




}