#include <Adafruit_NeoPixel.h>

#define PIN            4
#define NUMPIXELS      16
int delayval = 50;
int currentColor = 0;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin();             // This initializes the NeoPixel library.
  pixels.setBrightness(100);  // 100/255 brightness (about 40%)
  pixels.show();              // Initialize all pixels to 'off'
}

void loop() {
  uint32_t red = pixels.Color(255, 0, 0); //red
  uint32_t orange = pixels.Color(255, 100, 10); //orange
  uint32_t yellow = pixels.Color(255, 255, 0); //yellow
  uint32_t green = pixels.Color(0, 255, 0);//green
  uint32_t dkgreen = pixels.Color(0, 115, 0);//dark green
  uint32_t cyan = pixels.Color(0, 255, 255); //cyan
  uint32_t blue = pixels.Color(0, 0, 255); //blue
  uint32_t magenta = pixels.Color(255, 0, 255); //magenta
  uint32_t purple = pixels.Color(50, 0, 50); //purple
  //put the colors in an array
  uint32_t colors [9] = {red, orange, yellow, green, dkgreen, cyan, blue, magenta, purple}; 
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, colors[currentColor]);
    delay(delayval);
    pixels.show();
    currentColor++;
    if (currentColor >= 9) currentColor = 0;
  }
}