#define LED1 2   
#define LED2 12  
#define BUTTON_PIN 14 

bool running = false;
int delayTime = 200;
int ledState = 0;
unsigned long previousMillis = 0;

void setup() {
    Serial.begin(115200);

    pinMode(LED1, OUTPUT);
    pinMode(LED2, OUTPUT);
    pinMode(BUTTON_PIN, INPUT_PULLUP); 
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
}

void loop() {
    if (digitalRead(BUTTON_PIN) == LOW) {  
        delay(50); 
        if (digitalRead(BUTTON_PIN) == LOW) {
            ledState = (ledState + 1) % 2;  
            while (digitalRead(BUTTON_PIN) == LOW); 
        }
    }

    if (running) {
        unsigned long currentMillis = millis();

        if (currentMillis - previousMillis >= delayTime) {
            previousMillis = currentMillis;

            digitalWrite(LED1, LOW);
            digitalWrite(LED2, LOW);

            if (ledState == 0) digitalWrite(LED1, HIGH);
            if (ledState == 1) digitalWrite(LED2, HIGH);
        }
    }
}