Adafruit Circuit Playground Suicide

#include <FastLED.h>
#define LED_PIN     17

// Information about the LED strip
#define NUM_LEDS    10
#define CHIPSET     WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];
#define BRIGHTNESS  255

// Variables
int lead_dot = 0;
int bpm = 60;

void loop()
{
  EVERY_N_MILLISECONDS(300)
  {
    lead_dot = random(NUM_LEDS);
    leds[lead_dot] = CHSV(random(55) + 128, 255, random(128) + 128);
  }
  fadeToBlackBy(leds, lead_dot + 1, (beatsin8(bpm, 0, NUM_LEDS)));
  fadeToBlackBy(leds, lead_dot, (beatsin8(bpm, 0, NUM_LEDS))); // <--change this to 'lead_dot -1' to cause problems with Adafruit CP
  FastLED.show();
}

void setup() {
  FastLED.delay( 3000 ); // power-up safety  FastLED.delay
  // It's important to set the color correction for your LED strip here,
  // so that colors can be more accurately rendered through the 'temperature' profiles
  FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalSMD5050 );
  //FastLED.setBrightness( BRIGHTNESS );

}