const int buttonPin = 15;
const int ledCount = 3;  
int ledPins[] = {5, 18, 19};
int currentLed = 0; 


bool buttonState = false;
bool lastButtonState = false;

void setup() {
  Serial.begin(115200);
  pinMode(buttonPin, INPUT);
  for (int i = 0; i < ledCount; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  buttonState = digitalRead(buttonPin);
  if (buttonState == HIGH && lastButtonState == LOW) {
    digitalWrite(ledPins[currentLed], LOW);
    currentLed = (currentLed + 1) % ledCount;
    digitalWrite(ledPins[currentLed], HIGH);
    delay(200);
  }
  lastButtonState = buttonState;
}