#include "FastLED.h"

#define NUM_LEDS 30
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() {
       FastLED.addLeds<ws2811, data_pin,="" rgb="">(leds, NUM_LEDS);
      for (int i = 0; i < NUM_LEDS; i++) {
        leds[i] = CRGB::Black;
      }
      FastLED.show();
}

void loop() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(1000);
  }
}