void setup() 
{
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);

}

void loop() 
{
  digitalWrite(11, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(9, HIGH);


delay(400);

   digitalWrite(11, LOW);
   digitalWrite(10, LOW); 
   digitalWrite(9, LOW);

   delay(400);


}