#include "FastLED.h"

#define DATA_PIN 3
#define BRIGHTNESS 255
#define NUM_LEDS 125
CRGB leds[NUM_LEDS];
CRGB ring[NUM_LEDS];

uint8_t pos;
uint8_t hue;
CHSV ringColor = CHSV(hue+128,120,255);

void setup() {
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
  FastLED.setBrightness(BRIGHTNESS);
  Serial.begin(115200);
}


void loop() {

  EVERY_N_MILLISECONDS(120) {
    hue++;
    ringColor = CHSV(hue+128,150,255);
  }

  fadeToBlackBy(leds, NUM_LEDS, 2);

  leds[pos] = CHSV(hue, 220, 255);

  uint8_t ringStart = beatsin8(8,14,70);
  fill_gradient(ring, ringStart, CHSV(0,0,0) , ringStart+21, ringColor, SHORTEST_HUES);
  fill_solid(ring+(ringStart+22), 8, ringColor );
  fill_gradient(ring, ringStart+30, ringColor , ringStart+51, CHSV(0,0,0), SHORTEST_HUES);

  for (uint8_t i = 0; i < NUM_LEDS; i++) {
    leds[i].r = max(ring[i].r, leds[i].r);
    leds[i].g = max(ring[i].g, leds[i].g);
    leds[i].b = max(ring[i].b, leds[i].b);
  }

  EVERY_N_MILLISECONDS(15) {
    pos = pos + 1;
    if (pos == NUM_LEDS) {
      pos = 0;
    }

  }

  FastLED.show();

}