void setup() {
  //program ini berfungsi sebagai inisal;
  pinMode(8,OUTPUT );
  pinMode(9,OUTPUT );
  pinMode(10,OUTPUT );
  pinMode(11,OUTPUT );
  pinMode(12,OUTPUT );
  pinMode(13,OUTPUT );
}
void loop(){
  //put your main code here, to run repeatedly;
  digitalWrite(13,HIGH);
  delay(100);
  digitalWrite(13,LOW);
delay(50);
digitalWrite(12,HIGH);
delay(100);
digitalWrite(12,LOW);
delay(50);
digitalWrite(11,HIGH);
delay(100);
digitalWrite(11,LOW);
delay(50);
digitalWrite(10,HIGH);
delay(100);
digitalWrite(10,LOW);
delay(50);
digitalWrite(9,HIGH);
delay(100);
digitalWrite(9,LOW);
delay(50);
digitalWrite(8,HIGH);
delay(100);
digitalWrite(8,LOW);
delay(50);

}