#include <neopixel.h>


// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D3
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() {

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {

  uint16_t i;
  uint32_t c = strip.Color(255, 255, 255);

  for(i=0; i< strip.numPixels(); i++) {
    strip.setPixelColor(i, c );
		strip.show();
		delay( 100 );
  }
  for(i=strip.numPixels(); i> 0; i--) {
    strip.setPixelColor(i, 0 );
		strip.show();
		delay( 100 );
  }

	delay( 100 );

}