void setup() {
  // put your setup code here, to run once:
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  for (int i = 11; i > 3; i--){
    digitalWrite(i, HIGH);
    delay(1000);
    digitalWrite(i, LOW);
  }

}