#define LED1 D0
#define LED2 D6
#define LED3 D7
#define BUTTON D1

int buttonState = 0;
int lastButtonState = 0;

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(BUTTON, INPUT);
}

void loop() {
  buttonState = digitalRead(BUTTON);

  if (buttonState != lastButtonState) {
    if (buttonState == HIGH) {
      // Realizar acciones cuando el botón está presionado
      fadeLEDs();
    }
    delay(50);  // Debounce
  }

  lastButtonState = buttonState;
}

void fadeLEDs() {
  const int fadeDuration = 2000; // Duración de la animación en milisegundos
  const int steps = 100; // Número de pasos de la animación
  const int delayBetweenSteps = fadeDuration / steps;

  for (int i = 0; i <= steps; i++) {
    int brightness = map(i, 0, steps, 0, 255);

    analogWrite(LED1, brightness);
    analogWrite(LED2, brightness);
    analogWrite(LED3, brightness);

    delay(delayBetweenSteps);
  }

  for (int i = steps; i >= 0; i--) {
    int brightness = map(i, 0, steps, 0, 255);

    analogWrite(LED1, brightness);
    analogWrite(LED2, brightness);
    analogWrite(LED3, brightness);

    delay(delayBetweenSteps);
  }
  
  // Apagar LEDs al finalizar la animación
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
}