void loop(){
  int p1=digitalRead(23);
  int pl2=digitalRead(22);
  if(pl=00)
  }
  digitalWrite(4; HIGH);
  Serial.println("Led encendido");
  delay(200);

  if (p2==0){
    digitalWrite(4; LOW);
    Serial.printl("led apagado");
    delay(200);
  }