int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
int wait = 1000;

void setup(){
  for(int i = 0; i <10; i++){
      pinMode(ledPins[i], OUTPUT);
        }
        }

        void loop(){
            for(int i = 0; i <10; i++){
              digitalWrite(ledPins[i], HIGH);
                delay(wait);

                  digitalWrite(ledPins[i], LOW);
                    delay(wait);
                        }
                        }