#include <Adafruit_NeoPixel.h>
Adafruit_NeoPixel pixelsFirst = Adafruit_NeoPixel(48, 6, NEO_GRB + NEO_KHZ800);

void setup() {
  pixelsFirst.begin();
  pixelsFirst.show();
}

int i = 0;
void loop() {
  pixelsFirst.setPixelColor(i % 48, pixelsFirst.Color((2 * i) % 255, 50, 170));
  i++;
  pixelsFirst.show();
  delay(100);
}