void setup() {
  for (int pin = 2; pin <= 9; pin++) {
  pinMode(pin, OUTPUT);
  }
  }
  void loop(){
  for (int pin = 2; pin <= 9; pin++){
digitalWrite(pin, 1);
}
delay(250);

 for (int pin = 2; pin <= 9 pin++){
 digitalWrite(pin, 0);}
 delay(250);
 }