void setup() 
{
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}
void loop() {
  if (digitalRead(3) == LOW) 
  {
    digitalWrite(8, HIGH);
    delay(2000);
    digitalWrite(8, LOW);
  }
  if (digitalRead(4) == LOW)
   {
    digitalWrite(9, HIGH);
    delay(2000);
    digitalWrite(9, LOW);
  }
}