#include <Adafruit_NeoPixel.h>

#define PIN 3
#define NUM_PIXELS 32

Adafruit_NeoPixel pixels(NUM_PIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin();
}

void loop() {
  static uint8_t j = 0;
  byte k = 0, l = (j++ & 2) ? 5 : 3, p = (j & 1) ? 4 : 2, o = (j & 4) ? 64 : 32;
  for (int i = 0; i < 256 * 24; i++) {
    for (int pixel = 0; pixel < NUM_PIXELS; pixel++) {
      if (k & o) {
        k += p;
        pixels.setPixelColor(pixel, 255, 0, 0); // Red
      } else {
        k += l;
        pixels.setPixelColor(pixel, 0, 0, 255); // Blue
      }
    }
    pixels.show();
  }
  delay(5000);
}