int mypin[] = {2,3,4,5,6,7,8,9,10,11};



void setup() {
  // put your setup code here, to run once:
  for (int i =0; i<=10; i++)
  pinMode(mypin[i], OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  for (int i =0; i<=10;i++)
  {

    flash(mypin[i], 20);
  }


}


void flash(int pin, int duration)
{
  digitalWrite(pin,HIGH);
  delay(duration);
  digitalWrite(pin, LOW);
  delay(duration);
}