#define FASTLED_ALLOW_INTERRUPTS 0
#include <FastLED.h>


#define LED_PIN     3
#define NUM_LEDS    60
#define BRIGHTNESS  128
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB

CRGB leds[NUM_LEDS];
int value;
int led;


void setup() {
  delay(1000);
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(BRIGHTNESS);

  for (int p = 0; p <= 13; p++) {
    pinMode(p, OUTPUT);
    digitalWrite(p, 0);
  }

  Serial.begin(57600);
}

void loop() {
  while (Serial.available() >= 3 && Serial.read() == 0xff) {
    value = Serial.read();

    if(value == 36) {
      for(int l = 0; l < NUM_LEDS; l++) {
        if(l % 2 == 0) {
          leds[l] = CRGB::Yellow;
        } else {
          leds[l]=  CRGB::Red;
        }
      }
    } else {
      leds[random(0, NUM_LEDS-1)] = CHSV(map(value, 0, 127, 0, 255), 230, 230);
    }
  }

  if (millis() % 5 == 0)
    for (int i = 0; i < NUM_LEDS; i++)
      leds[i].fadeToBlackBy(64);

  FastLED.show();
}