void setup() {
  pinMode(1, OUTPUT);

}

void loop() {
  int tempo = 200;

  analogWrite(3, 127);
  digitalWrite(1, HIGH);
  delay(tempo);
  digitalWrite(1, LOW);
  delay(tempo);

  digitalWrite(1, HIGH);
  delay(tempo);
  digitalWrite(1, LOW);
  delay(tempo);

  digitalWrite(1, HIGH);
  delay(tempo);
  digitalWrite(1, LOW);
  delay(tempo);

  digitalWrite(1, HIGH);
  delay(tempo);
  digitalWrite(1, LOW);
  delay(tempo);

}