// sketch_06_01_int
const byte ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

void setup()
{
  for (int i = 0; i < 12; i++)
  {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], HIGH);
  }
  Serial.begin(9600);
  Serial.println(freeRam());
}

void loop()
{
}

int freeRam () 
{
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}