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

#define PIN_NEO_PIXEL  2   // Arduino pin that connects to NeoPixel
#define NUM_PIXELS     9  // The number of LEDs (pixels) on NeoPixel

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

int DELAY_INTERVAL = 500;
int DELAY_1 = 5;
int DELAY_2 = 250;
int DELAY_LINE = 500;

void setup() {
  NeoPixel.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

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

      pixel_on(1, 2);
      pixel_on(5, 2); delay(DELAY_LINE); 
      pixel_off(1);
      pixel_off(5); //delay(1000); 

      pixel_on(0, 3);
      pixel_on(4, 3);
      pixel_on(8, 3); delay(DELAY_LINE); 
      pixel_off(0);
      pixel_off(4);
      pixel_off(8); //delay(1000); 

      pixel_on(3, 3);
      pixel_on(7, 3); delay(DELAY_LINE); 
      pixel_off(3);
      pixel_off(7); //delay(1000); 

      pixel_on(6, 1); delay(DELAY_LINE); 
      pixel_off(6);


 
      for (int _pixel = 0; _pixel <= 8; _pixel++) {
            NeoPixel.setPixelColor(_pixel, NeoPixel.Color(255, 0, 0)); 
            NeoPixel.show();   

            delay(250); // pause between each pixel
      }

      for (int _pixel = 8; _pixel >= 0; _pixel--) {
            NeoPixel.setPixelColor(_pixel, NeoPixel.Color(0, 255, 0)); 
            NeoPixel.show();   

            delay(250); // pause between each pixel
      }

      for (int _pixel = 2; _pixel <= 8; _pixel+=3) {
            NeoPixel.setPixelColor(_pixel, NeoPixel.Color(0, 255, 255)); 
            NeoPixel.show();   

            //delay(250); // pause between each pixel
      }

      delay(DELAY_LINE);

      for (int _pixel = 1; _pixel <= 7; _pixel+=3) {
            NeoPixel.setPixelColor(_pixel, NeoPixel.Color(0, 255, 255)); 
            NeoPixel.show();   

            //delay(250); // pause between each pixel
      }

      delay(DELAY_LINE);
      
      for (int _pixel = 0; _pixel <= 6; _pixel+=3) {
            NeoPixel.setPixelColor(_pixel, NeoPixel.Color(0, 255, 255)); 
            NeoPixel.show();   

            //delay(250); // pause between each pixel
      }

      delay(DELAY_LINE);

      pixel_off(9);

      pixel_on(8, 3); pixel_on(7, 3); pixel_on(6, 3); 
      delay(DELAY_LINE); 
      pixel_off(8); pixel_off(7); pixel_off(6); 

      pixel_on(5, 3); pixel_on(4, 3); pixel_on(3, 3); 
      delay(DELAY_LINE); 
      pixel_off(5); pixel_off(4); pixel_off(3); 

      pixel_on(2, 3); pixel_on(1, 3); pixel_on(0, 3); 
      delay(DELAY_LINE); 
      pixel_off(2); pixel_off(1); pixel_off(0); 


//      pixel_off(1);
//      pixel_off(5);    

}
//    delay(DELAY_INTERVAL);

//    for (int fade = 255; fade > 0; fade--) {
//          NeoPixel.setPixelColor(0, NeoPixel.Color(fade, 255 - fade, 0));
//          NeoPixel.show(); 
//          delay(DELAY_1);
//    }

//    for (int fade = 255; fade > 0; fade--) {
//          NeoPixel.setPixelColor(0, NeoPixel.Color(0, fade, 255 - fade));
//          NeoPixel.show(); 
//          delay(DELAY_1);
//    }

//    for (int fade = 255; fade > 0; fade--) {
//          NeoPixel.setPixelColor(0, NeoPixel.Color(255 - fade, 0, fade));
//          NeoPixel.show(); 
//          delay(DELAY_1);
//    }