#include "FastLED.h"

#define NUM_LEDS 100
#define LED_DATA_PIN 3
#define BRIGHTNESS 255
#define UPDATES_PER_SECOND 60

CRGB leds[NUM_LEDS];

// Animation attributes
CRGBPalette16 currentPalette = RainbowColors_p;
TBlendType currentBlending = LINEARBLEND;
uint8_t startIndex = 0;

void setup()
{
    FastLED.addLeds<WS2812B, LED_DATA_PIN, GRB>(leds, NUM_LEDS);
    FastLED.setBrightness(BRIGHTNESS);
}

void loop()
{
    startIndex++;

    uint8_t colorIndex = startIndex;
    for(int i = 0; i < NUM_LEDS; i++) {
        leds[i] = ColorFromPalette(currentPalette, colorIndex, BRIGHTNESS, currentBlending);
        colorIndex += 3;
    }

    FastLED.delay(1000 / UPDATES_PER_SECOND);
}