#include <FastLED.h>

constexpr uint8_t NUM_STRIPS     = 5;
constexpr uint8_t LEDS_PER_STRIP = 6;
constexpr uint8_t TOTAL_LEDS     = NUM_STRIPS * LEDS_PER_STRIP;

CRGB leds[TOTAL_LEDS];

void setup() {
  FastLED.addLeds<NEOPIXEL, 8>(leds, 0,  LEDS_PER_STRIP);
  FastLED.addLeds<NEOPIXEL, 9>(leds, 6,  LEDS_PER_STRIP);
  FastLED.addLeds<NEOPIXEL, 10>(leds, 12, LEDS_PER_STRIP);
  FastLED.addLeds<NEOPIXEL, 11>(leds, 18, LEDS_PER_STRIP);
  FastLED.addLeds<NEOPIXEL, 12>(leds, 24, LEDS_PER_STRIP);

  FastLED.setBrightness(255);
}

void loop() {
  for (int i = 0; i < TOTAL_LEDS; i++) {
    leds[i] = CHSV(0, 255, 255);
    FastLED.show();
    delay(100);
    leds[i] = CRGB::Black;
  }
}