Intro
Idea from https://www.thingiverse.com/thing:2873557.
Test code
#include <FastLED.h> #define NUM_LEDS 25 #define DATA_PIN 6 CRGB leds[NUM_LEDS]; void setup() { FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS); } void loop() { leds[0] = CRGB::Red; FastLED.show(); delay(500); // Now turn the LED off, then pause leds[0] = CRGB::Black; FastLED.show(); delay(500); }