#include <FastLED.h>
#define NUM_LEDS 16
#define LED_PIN_RING 3

CRGB ledsRing[NUM_LEDS];

// Color Gradients
uint8_t paletteIndex = 0;
DEFINE_GRADIENT_PALETTE(red_gp){
  0, 255, 0, 0,
  255, 127, 0, 0
};
CRGBPalette16 red_palette = red_gp;

uint8_t BPM = 100;


void setup() {
  FastLED.addLeds<WS2812B, LED_PIN_RING, GRB>(ledsRing, NUM_LEDS);
  FastLED.setBrightness(255);
  FastLED.clear();
  FastLED.show();
  
}


void loop() {
  //fill_palette(ledsRing, NUM_LEDS, paletteIndex, 255 / NUM_LEDS, red_palette, 255, LINEARBLEND);
  //FastLED.show();

  EVERY_N_MILLISECONDS(60000 / BPM / 80){
    fill_palette(ledsRing, NUM_LEDS, paletteIndex, 255 / NUM_LEDS, red_palette, 255, LINEARBLEND);
    paletteIndex++;
    FastLED.show();
  };
  
}