// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// *********/

// Pin connected to the LED
const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17};
// Time interval between brightness steps (in milliseconds)
const int fadeInterval = 50;

// Maximum and minimum brightness values
const int maxBrightness = 220;
const int minBrightness = 60;

// Direction flag for fading (true = increasing, false = decreasing)
bool fadingDirection = true;

void setup() {
  // Initialize each LED pin as an output
  for (int i = 0; i < sizeof(ledPins) / sizeof(ledPins[0]); i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void fade() {
  // for (int j = 0; j < sizeof(ledPins) / sizeof(ledPins[0]); j++) {
  //       analogWrite(ledPins[j], 255);
  //     }
  //     delay(5000);
  // Update the brightness value based on the fading direction
  if (fadingDirection) {
    for (int i = minBrightness; i <= maxBrightness; i++) {
      Serial.println(i);
      
      // Set the LED brightness for each pin
      for (int j = 0; j < sizeof(ledPins) / sizeof(ledPins[0]); j++) {
        analogWrite(ledPins[j], i);
      }
      
      // Delay for the fade interval
      delay(fadeInterval);
    }

    fadingDirection = false;
  } else {
    for (int i = maxBrightness; i >= minBrightness; i--) {
      Serial.println(i);
      
      // Set the LED brightness for each pin
      for (int j = 0; j < sizeof(ledPins) / sizeof(ledPins[0]); j++) {
        analogWrite(ledPins[j], i);
      }
      
      // Delay for the fade interval
      delay(fadeInterval);
    }

    fadingDirection = true;
  }
}

void loop() {
  fade();
}