int pinLED[] = {22,23,24,25,26,27,28,29};
int jumlahLED = 8;

void setup() {
  // put your setup code here, to run once:
  for(int ito = 0; ito < jumlahLED; ito++){
    pinMode(pinLED[ito], OUTPUT);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int ito = jumlahLED -1; ito >= 0; ito--){
    digitalWrite(pinLED[ito], HIGH);
    delay(100);
    digitalWrite(pinLED[ito], LOW);
  }  
  for(int ito = 0; ito < jumlahLED; ito++){
    digitalWrite(pinLED[ito], HIGH);
    delay(100);
    digitalWrite(pinLED[ito], LOW);
  }

}