prototype for creating code the gist

fastled arduino.ino

#include <FastLED.h>
#define NUM_LEDS 250
#define DATA_PIN A0
#define DIRECTION right

CRGB leds[NUM_LEDS];

void shiftRight(byte reds[], byte greens[], byte blues[]) {
    int tempRed = reds[NUM_LEDS - 1];
    int tempGreen = greens[NUM_LEDS - 1];
    int tempBlue = blues[NUM_LEDS - 1];
    for(int ledIndex = NUM_LEDS - 1; ledIndex > 0; ledIndex -= 1) {
        reds[ledIndex] = reds[ledIndex - 1];
        greens[ledIndex] = greens[ledIndex - 1];
        blues[ledIndex] = blues[ledIndex - 1];
    }
    reds[0] = tempRed;
    greens[0] = tempGreen;
    blues[0] = tempBlue;  
}

void shiftLeft(byte reds[], byte greens[], byte blues[]) {
    int tempRed = reds[0];
    int tempGreen = greens[0];
    int tempBlue = blues[0];
    for(int ledIndex = 0; ledIndex < NUM_LEDS - 1; ledIndex += 1) {
        reds[ledIndex] = reds[ledIndex + 1];
        greens[ledIndex] = greens[ledIndex + 1];
        blues[ledIndex] = blues[ledIndex + 1];
    }
    reds[NUM_LEDS - 1] = tempRed;
    greens[NUM_LEDS - 1] = tempGreen;
    blues[NUM_LEDS - 1] = tempBlue;  
}

void displayLeds(byte reds[], byte greens[], byte blues[]) {
    for(int ledIndex = 0; ledIndex < NUM_LEDS; ledIndex += 1) {
        leds[ledIndex].setRGB(reds[ledIndex], greens[ledIndex], blues[ledIndex]);
    }
    FastLED.show();
    delay(500);
}

void setup() {
    FastLED.addLeds<WS2811, DATA_PIN, GRB>(leds, NUM_LEDS);
    FastLED.setBrightness(10);
}

void nextFrame(uint32_t * colors) {
  
}

void loop() {
     
    // We declare these large values here for memory reasons
    uint32_t colors[] = {0xAA0000,0xAA0000,0xAA0000,0xAA0000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000,0x000000};

}