#include <Adafruit_NeoPixel.h>
#define PIXDATPIN 2                   // data pin
#define SIDECOUNT 8                   // number of sides
#define PIXPERSIDE 8                  // pixels per side
#define PIXELS SIDECOUNT * PIXPERSIDE // total number of pixels
#define MAXBRIGHT 255                 // determine power use
Adafruit_NeoPixel lamp(PIXELS, PIXDATPIN, NEO_GRB + NEO_KHZ800);

#define SINGLEREV 8000  // milliseconds per revolution
int side;
int RED = 255, GRN = 255, BLU = 63;  // change colors for holidays or time of day

void setup() {
  lamp.begin();                   // start the object
  lamp.clear();                   // clear the color buffer
  lamp.setBrightness(MAXBRIGHT);  // set maximum brightness
}

void loop() {
  if (side++ == SIDECOUNT - 1)  // cycle through sides
    side = 0;
  lamp.show();                                         // display last buffer (clear)
  for (byte pixel = 0; pixel < PIXPERSIDE; pixel++) {  // light all pixels on one side
    // using "+0" and "/ 1" to keep code aligned
    lamp.setPixelColor(((side + 0) % 8) * PIXPERSIDE + pixel, lamp.Color(RED / 2, GRN / 2, BLU / 2));
    lamp.setPixelColor(((side + 1) % 8) * PIXPERSIDE + pixel, lamp.Color(RED / 1, GRN / 1, BLU / 1));
    lamp.setPixelColor(((side + 2) % 8) * PIXPERSIDE + pixel, lamp.Color(RED / 2, GRN / 2, BLU / 2));
  }
  lamp.show();                   // display colors
  delay(SINGLEREV / SIDECOUNT);  // divide revolution by number of sides
  lamp.clear();                  // clear buffer (but do not yet display buffer)
}