int led = 2;
void setup() {
  // put your setup code here, to run once:
  for(int led=2;led<=9;led++){
    pinMode(led, OUTPUT);
    digitalWrite(led,LOW);
  }
  pinMode(A15,OUTPUT);
  digitalWrite(A15,LOW);
  //digitalWrite(4,LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int led=2;led<=9;led++){
    digitalWrite(led,LOW);
    delay(1000);
    digitalWrite(led,HIGH);
  }
}