void setup() 
{
  pinMode(8, OUTPUT);
  pinMode(13, INPUT);
}

void loop() 
{  
  if (digitalRead(13) == HIGH)
  {
    digitalWrite(8, HIGH);
  }
  
  if (digitalRead(12) == HIGH)
  {
    digitalWrite(8, HIGH);
    delay(500);
    digitalWrite(8, LOW);
    delay(500);
  }
}