int led_pin = 13;
int button_pin = 9;


void setup(void) {
  // put your setup code here, to run once:
  pinMode(led_pin, OUTPUT);
  pinMode(button_pin, INPUT_PULLUP);
}

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

  // IF-STATEMENT

  // DEBUGGING
  // bug

  if (digitalRead(button_pin) == LOW)
  {
    digitalWrite(led_pin, HIGH);
    delay(1000);
  }
  else if (digitalRead(button_pin) == HIGH)
  {
    digitalWrite(led_pin, LOW);

  }
}