void setup(){
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop(){

  if (digitalRead(10) == LOW){
    digitalWrite(LED_BUILTIN, LOW);
  }
  else {
    digitalWrite(LED_BUILTIN, HIGH);
  }

  for (int i=2; i < 10; i++){
    digitalWrite(i, HIGH);
    delay(600);
  }

  for(int i=2; i< 10; i++){
    digitalWrite(i, LOW);
    delay(600);
  }

  delay(1000);
}