#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

#define PIN_NEO_PIXEL  7   // Arduino pin that connects to NeoPixel
#define NUM_PIXELS     2  // The number of LEDs (pixels) on NeoPixel

Adafruit_NeoPixel NeoPixel(NUM_PIXELS, PIN_NEO_PIXEL, NEO_GRB + NEO_KHZ800);

int delay1 = 1000;
int delay0 = 100;
int sensorValue;
int _pr = 255;
int _pg = 0;
int _pb = 0;
int _color = 1;
int DELAY_LINE = 500;

void setup() {
  // put your setup code here, to run once:

  NeoPixel.begin();
}

void pixel_on(int _neo, int _col) {
      switch (_col) {
            case 1: NeoPixel.setPixelColor(_neo, NeoPixel.Color(255, 0, 0)); break;
      
            case 2: NeoPixel.setPixelColor(_neo, NeoPixel.Color(0, 255, 0)); break;
      
            case 3: NeoPixel.setPixelColor(_neo, NeoPixel.Color(0, 0, 255)); break;
      }
      NeoPixel.show();         
}

void pixel_off(int _neo_off) {
      if (_neo_off == 9) {
            for (int _pixel = 0; _pixel <= 8; _pixel++) {
                  NeoPixel.setPixelColor(_pixel, NeoPixel.Color(0, 0, 0)); 
                  NeoPixel.show();
            }
      }
      else {
            NeoPixel.setPixelColor(_neo_off, NeoPixel.Color(0, 0, 0)); 
            NeoPixel.show();
      }
}


void loop() {
  // put your main code here, to run repeatedly:

  pixel_on(0, 1);
  pixel_on(1, 1); delay(DELAY_LINE); 
  pixel_off(0);
  pixel_off(1); //delay(1000); 

  pixel_on(0, 2);
  pixel_on(1, 2); delay(DELAY_LINE); 
  pixel_off(0);
  pixel_off(1);

  pixel_on(0, 3);
  pixel_on(1, 3); delay(DELAY_LINE); 
  pixel_off(0);
  pixel_off(1); //delay(1000); 

// NeoPixels
// 2 5 8
// 1 4 7
// 0 3 6

}