void setup() {
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(30, OUTPUT);
  pinMode(31, OUTPUT);
  pinMode(34, OUTPUT);
  pinMode(35, OUTPUT);

}

void loop() {
  int arrLed[] = {22, 23, 26, 27, 30, 31, 34, 35};
  int i;

  for (i = 8; i >= 0; i--)
  {
    digitalWrite(arrLed[i], HIGH);
    delay(500);
    digitalWrite(arrLed[i], LOW);
    delay(500);
  }

  for (i = 1; i < 8; i++)
  {
    digitalWrite(arrLed[i], HIGH);
    delay(500);
    digitalWrite(arrLed[i], LOW);
    delay(500);
  }
}