5_arrays.ino

// C++ code
//
int timer = 1000;
int ledPins[] = {2,3,4,5,6,7};
int pinCount = 6;

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

void loop()
{
  for(int i=0;i<pinCount;i++){
    digitalWrite(ledPins[i],HIGH);
    delay(timer);
    digitalWrite(ledPins[i],LOW);
  }
  for(int i = pinCount-1;i>=0;i--){
    digitalWrite(ledPins[i],HIGH);
    delay(timer);
    digitalWrite(ledPins[i],LOW);
  }
}