FastLED palettes by number - working

/* Palette Pointers working
 *
 * By: Andrew Tuline
 *
 * Date: January, 2021
 *
 * Finally, a working version of code that programatically refers to built-in palettes by an index number.
 *
 */

#include <FastLED.h>

#define ARRAY_SIZE(A) (sizeof(A) / sizeof((A)[0]))

#define LED_DT 12
#define COLOR_ORDER GRB
#define LED_TYPE WS2812
#define NUM_LEDS 30

#define BRIGHTNESS 64

struct CRGB leds[NUM_LEDS];

FL_PROGMEM extern const TProgmemRGBPalette16 *const palettes[] = {
  &PartyColors_p, &CloudColors_p, &OceanColors_p, &ForestColors_p,
  &LavaColors_p, &HeatColors_p, &RainbowColors_p
  };

CRGBPalette16 currentPalette;


void setup() {
  Serial.begin(115200);
  LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS);
  FastLED.setBrightness(BRIGHTNESS);
} // setup()


void loop () {
  uint8_t palette_num = (millis()/2000) % sizeof(palettes);
  currentPalette = *(TProgmemRGBPalette16 *) pgm_read_ptr_near(&palettes[palette_num]);
  Serial.println(palette_num);
  fill_palette(leds, NUM_LEDS, 0, (256/NUM_LEDS)+1, currentPalette, 255, NOBLEND);
  FastLED.show();
} // loop()