/*#include <Adafruit_NeoPixel.h>

#define PIN 9

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(12, PIN, NEO_GRB + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel. Avoid connecting
// on a live circuit... if you must, connect GND first.

void setup() {
  strip.begin();
  strip.show(); // initialize all pixels to "off"
}

void loop() {
  brighten();
  darken();
}

// 0 to 255
void brighten() {
  uint16_t i, j;

  for (j = 0; j < 100; j++) {
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, 0, j, 0);
    }
    strip.show();
    delay(10);
  }
  delay(1500);
}

// 255 to 0
void darken() {
  uint16_t i, j;

  for (j = 100; j > 0; j--) {
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, 0, j, 0);
    }
    strip.show();
    delay(10);
  
  }
  delay(1500);
}*/

/**************************************************************************************************
 * Arduino Sketch for NeoPixel Ring with Rotating Effect
 * 
 * This code controls a 12-LED NeoPixel ring to create a rotating effect. The LEDs light up in 
 * sequence in a clockwise direction, leaving a trailing effect as they turn off. The sketch 
 * utilizes the FastLED library to manage the LED strip and create the desired visual effect.
 * 
 * Components:
 * - Arduino Nano
 * - Adafruit 12 NeoPixel Ring
 * 
 * Connections:
 * - NeoPixel Ring Data Pin -> Arduino Pin D11
 * - Power and Ground connections as per the circuit design
 * 
 * Libraries:
 * - FastLED: Used for controlling the NeoPixel LEDs
 * 
 * Author: [Your Name]
 * Date: [Date]
 ***************************************************************************************************/

#include <FastLED.h>

#define NUM_LEDS 12    // Define the number of LEDs in the NeoPixel ring
#define DATA_PIN 9     // Define the data pin for the NeoPixel ring
#define DELAY_TIME 125 // Define the delay time for the rotation effect

CRGB leds[NUM_LEDS];   // Create an array to hold the LED data

void setup() 
{
  // Initialize the FastLED library

  FastLED.addLeds<WS2812, DATA_PIN, GRB>(leds, NUM_LEDS);
  FastLED.clear();
  FastLED.show();
}

void loop() {
  
  // Rotate the LEDs in a clockwise direction

  for (int i = 0; i < NUM_LEDS; i++) 
  {
    leds[i] = CRGB::Red;
    for (int j = 1; j <= 5; j++)  // Create a trailing effect by dimming the previous LEDs
    {
      int index = (i - j + NUM_LEDS) % NUM_LEDS;
      leds[index].fadeToBlackBy(85); // Adjust the fade amount for the trail
    }
    FastLED.show();
    
    delay(DELAY_TIME); // Wait for a short period before moving to the next LED
  }
}