#define SWITCH_PIN 12
#define LED_PIN 25

void setup() {
  Serial.begin(115200);
  pinMode(SWITCH_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);
}

void loop() {
  static bool ledState = false;
  static bool lastSwitchState = HIGH;
  bool currentSwitchState = digitalRead(SWITCH_PIN);
  if(lastSwitchState == HIGH && currentSwitchState == LOW) {
    ledState = !ledState;
    digitalWrite(LED_PIN, ledState ? HIGH : LOW);
  }
  lastSwitchState = currentSwitchState;
  
}