Simple running light - FastLED

#include <FastLED.h>

#if FASTLED_VERSION < 3001000
#error "Requires FastLED 3.1 or later; check github for latest code."
#endif

#define DATA_PIN    2
#define LED_TYPE    NEOPIXEL
#define COLOR_ORDER GRB
#define NUM_LEDS    32
#define BRIGHTNESS 96

CRGB leds[NUM_LEDS];


void setup() {
 delay(3000); // 3 second delay for recovery

  // tell FastLED about the LED strip configuration
  FastLED.addLeds<LED_TYPE,DATA_PIN,COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip).setDither(false);
  FastLED.setBrightness(BRIGHTNESS);
  fill_solid(leds, NUM_LEDS, CRGB::Black);
  FastLED.show();
}



// magic happens in here
void loop()
{
    fadeToBlackBy( leds, NUM_LEDS, 20);
    leds[beatsin16(20,0,NUM_LEDS)] = CRGB::Red;
    FastLED.show();
}