WS2812

#include <FastLED.h>

int r = 0;
int g = 0;
int b = 0;

#define LED_PIN     5
#define NUM_LEDS    16

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
}
void loop()
{
  c1();
  c2();
}


void c1() {//White
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB (100, 100, 100);
  }
  FastLED.show();
  delay(1000);
}
void c2() {//Red
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB (255, 0, 0);
  }
  FastLED.show();
  delay(1000);
}