#define LED_PIN 15
#define BUTTON_PIN 12
void LED_On()
{
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);

}
void LED_Off()
{
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, HIGH);
}
bool button_up = true;
bool led_stat = false;
void setup() {
  Serial.begin(115200);
  LED_Off();
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(BUTTON_PIN) == LOW)
  {
    if (button_up)
    {
      button_up = false;
      led_stat = !led_stat;
    }
  }
  else
  {
    button_up = true;
  }
  if (led_stat)
    LED_On();
  else
    LED_Off();

  delay(10); // this speeds up the simulation
}