void setup(){

  pinMode(14, OUTPUT);
  pinMode(12, INPUT);

}

bool ler = 0;

void loop(){

  ler = digitalRead(12);

  if(ler == 1){

  digitalWrite(14, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
  delay(1000);

  }else{
    digitalWrite(14, LOW);
  }

}