void setup() {

 pinMode(12, INPUT);
 pinMode(27, INPUT); 
 pinMode(14, OUTPUT);

}

int bt1=0, 
    bt2=0,
    k1=0;

void loop(){

 bt1=digitalRead(12);
 bt2=digitalRead(27);

  if((bt1 == 1)||(k1 == 1)){

   k1=1;
   digitalWrite(14, HIGH);
   delay(200);
   digitalWrite(14, LOW);
   delay(200);
}

if(bt2 == 1){

  k1=0;
  digitalWrite(14, LOW);
}
}