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

// Which pin on the Arduino is connected to the NeoPixels?
// On a Trinket or Gemma we suggest changing this to 1:
#define LED_PIN    2

// How many NeoPixels are attached to the Arduino?
#define LED_COUNT 64

// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
// Argument 1 = Number of pixels in NeoPixel strip
// Argument 2 = Arduino pin number (most are valid)
// Argument 3 = Pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)


// setup() function -- runs once at startup --------------------------------

void knightRider1() { Serial.println("loop0"); }
//void knightRider2() { Serial.println("loop1"); }
  //void loop2() { Serial.println("loop2"); }

void setup() {
  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
  // Any other board, you can remove this part (but no harm leaving it):
//#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
//  clock_prescale_set(clock_div_1);
//#endif
  // END of Trinket-specific code.

  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)

  Serial.begin(9600);
}

void loop() {
  //loop0(); delay(1000);  // for testing only
  knightRider1(strip.Color(255,  0,  0), 100, 5); // Red Bar
  //knightRider2(strip.Color(255,  127,  0), 500, 7); // Red Bar
  //	loop1(); delay(500);  // for testing only
  //loop2(); delay(100);  // for testing only
}


void knightRider1(uint32_t color, int wait, int barLength) {
  uint32_t off = (0, 0, 0);
  int i=0;
  int j=0;
  int k=0;
  int i2=0;
  int j2=0;
  int k2=0;

   while(i<strip.numPixels()) {
      for(int k=0; k<barLength; k++) {
       strip.setPixelColor(k, color);         //  Set pixel's color (in RAM)
       int k2 = LED_COUNT - k;
			 strip.setPixelColor(k2, color);
			 strip.show();                          //  Update strip to match 
		                         
			 delay(wait);                           //  Pause for a moment
      }

      for(int j=0; j>barLength; j++) {
      strip.setPixelColor(j, off);         //  Set Bar Pixel 1 to 0 (in RAM)
      strip.setPixelColor(j+barLength, color);    //  Set next Bar pixel to color (in RAM)
       int j2 =LED_COUNT - j;
			 strip.setPixelColor(j2, off);
			 strip.setPixelColor(j2-barLength, color);
			 			 
			 strip.show();
			//}
      //for(int j2=strip.numPixels(); j2>0; j2--) {
      /// strip.setPixelColor(j2, off);         //  Set Bar Pixel 1 to 0 (in RAM)
      // strip.setPixelColor(j2-barLength, color);         //  Set next Bar pixel to color (in RAM)
      // strip.show();                          //  Update strip to match
       delay(wait); 
      }


      for(int k=strip.numPixels(); k>strip.numPixels()-  barLength; k--) {
       strip.setPixelColor(k, color);         //  Set pixel's color (in RAM)
       int k2 = LED_COUNT - k;
			 strip.setPixelColor(k2, color);
			 strip.show();                          //  Update strip to match
      //}
      //for(int k2=0; k2<barLength; k2++) {	 
      //strip.setPixelColor(k2, color);         //  Set pixel's color (in RAM)
      //strip.show();                          //  Update strip to match
       delay(wait);                           //  Pause for a moment
      }

      for(int j=strip.numPixels(); j>barLength; j--) {
       strip.setPixelColor(j, off);         //  Set Bar Pixel 1 to 0 (in RAM)
       strip.setPixelColor(j-barLength, color);
			 int j2 = LED_COUNT - j;
			 strip.setPixelColor(j2, off);
			 strip.setPixelColor(j2+barLength, color);
			          //  Set next Bar pixel to color (in RAM)
       strip.show();                          //  Update strip to match
                          //  Update strip to match
       delay(wait); 
      }
}
}