#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);


void setup() {
    strip.begin();
    
    Particle.function("red", setRed);
}


void loop() {
    uint32_t c1 = strip.Color(255, 255, 255); // white
 
    for( int i = 0; i < strip.numPixels(); i++ ){
        strip.setPixelColor(i, c1);
    }
    
    strip.show();
    delay( 100 );
}
 

int setRed(String color){ //functions for particle.function start with an int and take only string commands
  
    int rValue = color.toInt();  //first:convert string to number
    uint32_t red = strip.Color(rValue, 0, 0); //second: use the newly converted int to define color

    uint16_t i;
    for( int i = 0; i < strip.numPixels(); i++ ){
       strip.setPixelColor(i, red); // set a color 
       strip.show();
       delay( 1000 );
    }
    
    uint32_t c2 = strip.Color(255, 255, 255); //turning off by removing color
    for( int i = strip.numPixels(); i >-1; i-- ){
       strip.setPixelColor(i, c2); // set a color 
       strip.show();
       delay( 1000 );
    }
    
        return 1;
    }