hacer un sirena de un patrulla

void sirena_patrulla()
{
  analogWrite(5, 0);
  analogWrite(6, 0);
  analogWrite(9, 0);
  analogWrite(10, 0);
  analogWrite(11, 0);
  analogWrite(3, 500);
  delay(500);
  analogWrite(5, 0);
  analogWrite(6, 0);
  analogWrite(9, 0);
  analogWrite(10, 0);
  analogWrite(11, 0);
  analogWrite(3, 0);
  delay(500);
  analogWrite(5, 255);
  analogWrite(6, 255);
  analogWrite(9, 0);
  analogWrite(10, 0);
  analogWrite(11, 0);
  delay(500);
  analogWrite(5, 0);
  analogWrite(6, 0);
  analogWrite(9, 0);
  analogWrite(10, 0);
  analogWrite(11, 0);
  delay(500);
  analogWrite(5, 0);
  analogWrite(6