framework-arduinoteensy-cxx20/libraries/FastLED/examples/Blink/Blink.ino

#include <FastLED.h>

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

// For led chips like WS2812, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define DATA_PIN 3
#define CLOCK_PIN 13

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

void setup() { 
    // Uncomment/edit one of the following lines for your leds arrangement.
    // ## Clockless types ##
    FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
    // FastLED.addLeds<SM16703, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<TM1829, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<TM1812, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<TM1809, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<TM1804, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<TM1803, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<UCS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<UCS1903B, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<UCS1904, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<UCS2903, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<WS2852, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<GS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<SK6812, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<SK6822, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<APA106, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<PL9823, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<SK6822, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<WS2813, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<APA104, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<WS2811_400, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<GE8822, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<GW6205, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<GW6205_400, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<LPD1886, DATA_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<LPD1886_8BIT, DATA_PIN, RGB>(leds, NUM_LEDS);
    // ## Clocked (SPI) types ##
    // FastLED.addLeds<LPD6803, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
    // FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<WS2803, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<SM16716, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
    // FastLED.addLeds<P9813, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // BGR ordering is typical
    // FastLED.addLeds<DOTSTAR, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // BGR ordering is typical
    // FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // BGR ordering is typical
    // FastLED.addLeds<SK9822, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);  // BGR ordering is typical
}

void loop() { 
  // Turn the LED on, then pause
  leds[0] = CRGB::Red;
  FastLED.show();
  delay(500);
  // Now turn the LED off, then pause
  leds[0] = CRGB::Black;
  FastLED.show();
  delay(500);
}