void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(6, OUTPUT);
  pinMode(9, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  if( digitalRead(9) == LOW ){
    Serial.println("Hola San :)");

    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(6, LOW);

    delay(500);
  }
}