#include <FastLED.h>

// Define the LED matrix properties
#define LED_MATRIX_WIDTH 8
#define LED_MATRIX_HEIGHT 8
#define LED_PIN 3

// Set the LED matrix type and color order if needed
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB

// Define the LED array
CRGB leds[LED_MATRIX_WIDTH * LED_MATRIX_HEIGHT];

void setup() {
  // Initialize FastLED with the LED properties
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, LED_MATRIX_WIDTH * LED_MATRIX_HEIGHT);
}

void loop() {
  rainbowArtEffect();
}

// Function to create the rainbow art
void rainbowArtEffect() {
  static uint8_t hue = 0;

  // Iterate through each LED and set the color based on the current hue
  for (int y = 0; y < LED_MATRIX_HEIGHT; y++) {
    for (int x = 0; x < LED_MATRIX_WIDTH; x++) {
      // Calculate the index of the current LED
      int ledIndex = xyToIndex(x, y);

      // Set the color of the current LED
      leds[ledIndex] = CHSV(hue + x * 8, 155, 255);
    }
  }

  // Show the LED colors
  FastLED.show();

  // Increment the hue for the next frame
  hue += 5;
  delay(350); // Adjust the delay to control the speed of the animation
}

// Function to convert (x, y) coordinates to an index in the LED array
int xyToIndex(int x, int y) {
  if (y % 2 == 0) {
    return y * LED_MATRIX_WIDTH + x;
  } else {
    return y * LED_MATRIX_WIDTH + (LED_MATRIX_WIDTH - x - 1);
  }
}