#include <FastLED.h>

#define NUM_LEDS  200
#define LED_PIN   2

CRGB leds[NUM_LEDS];


void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(200);
}

void loop() {
  
  for (int i = 0; i < NUM_LEDS; i+=1) {
    leds[i] = CRGB::Blue;
    if (random(100)<2){leds[i] = CRGB::White;delay(2);}
    
  }
    FastLED.show(); 
}