int btnBlue = 11, btnGreen = 12;
int ledBlue = 3, ledGreen = 2;

int prevBtnBlueState = LOW;

void setup() {
  pinMode(btnBlue, INPUT);
  pinMode(btnGreen, INPUT);
  pinMode(ledBlue, OUTPUT);
  pinMode(ledGreen, OUTPUT);
}

void loop() {
  int btnBlueState = digitalRead(btnBlue);
  int btnGreenState = digitalRead(btnGreen);

  if (btnBlueState == LOW && prevBtnBlueState == HIGH) {
    delay(250);  // Penundaan untuk debouncing
    
    digitalWrite(ledBlue, !digitalRead(ledBlue));
  }

  prevBtnBlueState = btnBlueState;

  digitalWrite(ledGreen, btnGreenState == HIGH);
}