ArduinoLED_Array.ino

int ledPins[] = {2,3,4,5,6,7,8,9,10,11}; // The LED pins
int num = sizeof(ledPins) / sizeof(int);
int delayMS = 100;

void setup()
{
  for (int i = 0; i < num ; i++) 
  {
    pinMode(ledPins[i], OUTPUT);   
  }
}

void loop()
{
  for (int i = 0; i < num ; i++) 
  {
    digitalWrite(ledPins[i], LOW);
    delay(delayMS);
  }

  for (int i = 0; i < num ; i++) 
  {
    digitalWrite(ledPins[i], HIGH);
    delay(delayMS);
  }
}