#include <FastLED.h>

#define NUM_LEDS  28
#define LED_PIN   3

CRGB leds [NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness (255); 
      
}

bool finished;
bool initOnce;
int counter;

unsigned long now;

const bool doBLEU = true;
const bool doRED = true;

const bool dwell;

void loop() {

  now = millis();


  if (doBLEU) {
    counter = 300;
    finished = false;
    initOnce = true;

    while (!finished)
        Routine1();

// to remove last LED
    FastLED.clear();
    FastLED.show();

    if (dwell) delay(2000);
  }

  if (doRED) {
    counter = 750;
    finished = false;
    initOnce = true;

    while (!finished)
        Routine2();

// to remove last LED
    FastLED.clear();
    FastLED.show();

    if (dwell) delay(2000);
  }


}

// original being modified but not "corrected" or "improved"

void Routine1() {

  const uint32_t interval = 750UL; // half a 20BPM beat
  static unsigned long lastOffsetTime = 0;
  static uint32_t t0 = 0; // timebase
  static uint16_t phase = 0; // which segment of sine

  if (initOnce) {
    lastOffsetTime = now;
    t0 = now; // timebase
    initOnce = false;
  }

  if(now - lastOffsetTime >= interval){
    lastOffsetTime += interval;
    t0 = now ; // update timebase
  }
  
  uint16_t sinBeat = beatsin16(20, 0, NUM_LEDS - 1, t0, phase);

  fadeToBlackBy (leds, NUM_LEDS, 7);
  leds [sinBeat] = CRGB::Blue;

  FastLED.show();

  if (!--counter) finished = true;
}

void Routine2() {

  const uint32_t interval1 = 1500UL; // half a 20BPM beat
  static unsigned long lastOffsetTime1 = 0;
  static uint32_t t01 = 0; // timebase
//  static uint16_t phase1 = 32768/2; // which segment of sine
  static uint16_t phase1 = 16384; // which segment of sine


  if (initOnce) {
    lastOffsetTime1 = now;
    t01 = now; // timebase
    initOnce = false;
  }

  if(now - lastOffsetTime1 >= interval1){
    lastOffsetTime1 += interval1;
    t01 = now ; // update timebase
  }
  
  uint16_t sinBeat1 = beatsin16(33.3, 0, NUM_LEDS - 1, t01, phase1);

  fadeToBlackBy (leds, NUM_LEDS, 7);
  leds [sinBeat1] = CRGB::Red;

  FastLED.show();

  if (!--counter) finished = true;
}



/* MY Sub-Routines below because I broke them fixing them fixin them

const uint32_t interval = 750UL; // half a 20BPM beat
const uint16_t phase = 0; // which segment of sine

void Routine1() {

  static unsigned long lastOffsetTime = 0;
  static uint32_t t0 = 0; // timebase

  if (initOnce) {
    lastOffsetTime = now;
    t0 = now; // timebase
    initOnce = false;
  }

  if(now - lastOffsetTime >= interval){
    lastOffsetTime += interval;
    t0 = now ; // update timebase
  }
  
  uint16_t sinBeat = beatsin16(20, 0, NUM_LEDS - 1, t0, phase);

  fadeToBlackBy (leds, NUM_LEDS, 50);
  leds [sinBeat] = CRGB::Blue;

  FastLED.show();

  if (!--counter) finished = true;
}

const uint32_t interval2 = 1500UL; // half a 20BPM beat
//const uint16_t phase1 = 32768/2; // which segment of sine

void Routine2() {

  static unsigned long lastOffsetTime = 0;
  static uint32_t t0 = 0; // timebase

  if (initOnce) {
    lastOffsetTime = now;
    t0 = now; // timebase
    initOnce = false;
  }

  if(now - lastOffsetTime >= interval2){
    lastOffsetTime += interval2;
    t0 = now ; // update timebase
  }
  
  uint16_t sinBeat = beatsin16(33.3, 0, NUM_LEDS - 1, t0, phase);

  fadeToBlackBy (leds, NUM_LEDS, 50);
  leds [sinBeat] = CRGB::Red;

  FastLED.show();

  if (!--counter) finished = true;
}
*/