#include <FastLED.h>

// Define the number of LEDs
#define NUM_LEDS 448  // 16 * 28 = 448
#define DATA_PIN 13   // The data pin connected to the matrix

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

// Define the width and height of the matrix
const uint8_t kMatrixWidth = 28;
const uint8_t kMatrixHeight = 16;

// Function to convert x, y coordinates to an index in the LED array
uint16_t XY(uint8_t x, uint8_t y) {
  uint16_t index;
  if (y % 2 == 0) {
    // Even rows run left to right
    index = (y * kMatrixWidth) + x;
  } else {
    // Odd rows run right to left
    index = (y * kMatrixWidth) + (kMatrixWidth - 1 - x);
  }
  return index;
}

void setup() {
  // Initialize the LED array
  FastLED.addLeds<WS2812, DATA_PIN, GRB>(leds, NUM_LEDS);
  FastLED.clear();
  FastLED.show();
}

void loop() {
  // Example: Draw a moving rainbow pattern
  for (int x = 0; x < kMatrixWidth; x++) {
    for (int y = 0; y < kMatrixHeight; y++) {
      // Calculate the hue based on the x and y positions
      uint8_t hue = (x * 10) + (y * 10);
      leds[XY(x, y)] = CHSV(hue, 255, 255);
    }
  }
  FastLED.show();
  delay(100);

  // Move the rainbow pattern
  for (int x = 0; x < kMatrixWidth; x++) {
    for (int y = 0; y < kMatrixHeight; y++) {
      leds[XY(x, y)].nscale8(250);  // Dim the LEDs slightly
    }
  }
  FastLED.show();
  delay(100);
}