void setup() {
  // put your setup code here, to run once:
  pinMode(9, OUTPUT);
  pinMode(4, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:


  if (digitalRead(4) == LOW)
  {
    digitalWrite(9, HIGH);
    delay(200);
  } else {
    digitalWrite(9, LOW);
  }
}