#include <FastLED.h>

#define LED_PIN     3
#define NUM_LEDS    256
#define COLOR_DEPTH 16  // Number of colors in the palette

CRGB leds[NUM_LEDS];
CRGBPalette16 currentPalette;

// Define the pattern (1 byte per LED: index into the palette)
const uint8_t packedPattern[NUM_LEDS / 2] PROGMEM = {
  0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
  0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
  0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
  0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF
};


void setup() {
  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
  
  // Initialize the palette with predefined colors
  currentPalette = CRGBPalette16(
    CRGB::Black, CRGB::White,  CRGB::Red,   CRGB::Lime,
    CRGB::Blue,  CRGB::Yellow, CRGB::Cyan,  CRGB::Magenta,
    CRGB::Silver,CRGB::Gray,   CRGB::Maroon,CRGB::Olive,
    CRGB::Green, CRGB::Purple, CRGB::Teal,  CRGB::Navy
  );
}

void loop() {
  renderPattern();
  FastLED.show();
  delay(1000);  // Pause for 1 second
}

// Function to render the pattern
void renderPattern() {
  for (uint16_t i = 0; i < NUM_LEDS / 2; i++) {
    // Read a single byte from the packed pattern
    uint8_t packedByte = pgm_read_byte(&packedPattern[i]);

    // Extract the high nibble (first LED's color index)
    uint8_t highNibble = (packedByte >> 4) & 0x0F;
    leds[i * 2] = ColorFromPalette(currentPalette, highNibble * (255 / (COLOR_DEPTH - 1)));

    // Extract the low nibble (second LED's color index)
    uint8_t lowNibble = packedByte & 0x0F;
    leds[i * 2 + 1] = ColorFromPalette(currentPalette, lowNibble * (255 / (COLOR_DEPTH - 1)));
  }
}