// Source: https://github.com/s-marley/FastLED-basics
#include <FastLED.h>
#define NUM_LEDS 18
#define LED_PIN 2
CRGB leds[NUM_LEDS];
void setup() {
FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
FastLED.setBrightness(50);
}
void loop() {
leds[0] = CRGB::Red;
FastLED.show();
delay(200);
leds[0] = CRGB::Black;
FastLED.show();
delay(200);
}