#include <FastLED.h>

#define NUM_LEDS 64
CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<NEOPIXEL, PB1>(leds, NUM_LEDS);
  FastLED.setCorrection(UncorrectedColor);
  FastLED.setTemperature(UncorrectedTemperature);
  FastLED.setDither(DISABLE_DITHER);

  for (uint32_t i = 0; i < NUM_LEDS; i++)
    leds[i] = CRGB(i * 4, i * 4, i * 4);
  FastLED.show();
}

void loop() {

}