#include <FastLED.h>
 
// How many leds in your strip?
#define NUM_LEDS 12
 
// 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 2

// Define the array of leds
CRGB leds[NUM_LEDS];
 
void setup() { 
    FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
 
}
 
void loop() { 
  // Turn the LED on, then pause
  leds[0] = CRGB::Yellow;
  FastLED.show();
  leds[1] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[2] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[3] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[4] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[5] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[6] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[7] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[8] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[9] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[10] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  leds[11] = CRGB::Yellow;
  delay(20);
  FastLED.show();
  delay(400);
  // Now turn the LED off, then pause
  leds[0] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[1] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[2] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[3] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[4] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[5] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[6] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[7] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[8] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[9] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[10] = CRGB::Black;
  delay(20);
  FastLED.show();
  leds[11] = CRGB::Black;
  delay(20);
  FastLED.show();
  delay(400);
}