#include <FastLED.h>

// How many leds in your strip?
#define NUM_LEDS 1
#define DATA_PIN 1
#define COLOR_ORDER GRB

// Define the array of leds
CRGB leds[NUM_LEDS];

int brightness = 20; //value from 0-255 to manipulate brightness

void setup() {
  FastLED.addLeds<WS2812B, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
  FastLED.setBrightness(brightness);
  pinMode(DATA_PIN, OUTPUT);
}

void loop() {
  leds[0] = CRGB::Red;
  FastLED.show();
}