// This #include statement was automatically added by the Particle IDE.
#include <neopixel.h>

#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);
  int numPixels = strip.numPixels();

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

void loop() {
   
    uint16_t i;
    uint32_t c1 = strip.Color(0, 0, 255); // Blue
 
    for( int i = 0; i < strip.numPixels(); i++ ){
   strip.setPixelColor(i, c1); // set a color 
   strip.show();
   delay( 100 );
    }
    
    uint32_t c2 = strip.Color(0, 0, 0); //turning off by removing color
    for( int i = numPixels; i >0; i-- ){
   strip.setPixelColor(i, c2); // set a color 
   strip.show();
   delay( 100 );
    }
    
    uint32_t c3 = strip.Color(0, 255, 0); // Blue
 
    for( int i = 0; i < strip.numPixels(); i++ ){
   strip.setPixelColor(i, c3); // set a color 
   strip.show();
   delay( 100 );
    }
    
    for( int i = numPixels; i >0; i-- ){
   strip.setPixelColor(i, c2); // set a color 
   strip.show();
   delay( 100 );
    }
    
    uint32_t c4 = strip.Color(255, 0, 0); // Blue
 
    for( int i = 0; i < strip.numPixels(); i++ ){
   strip.setPixelColor(i, c4); // set a color 
   strip.show();
   delay( 100 );
    }
    
    for( int i = numPixels; i >0; i-- ){
   strip.setPixelColor(i, c2); // set a color 
   strip.show();
   delay( 100 );
    }

}