// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library
 
#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?
#define PIN       3 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 32 // Popular NeoPixel ring size
#define REDINTENSITY 0
#define GREENINTENSITY 250
#define BLUEINTENSITY 100

// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
#define FOLLOWPIXELS 8
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.

  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

void loop() {
  pixels.clear(); // Set all pixel colors to 'off'

  // The first NeoPixel in a strand is #0, second is 1, all the way up
  // to the count of pixels minus one.
  for(int i=0; i<NUMPIXELS; i++) { // For each pixel...

    // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
    // Here we're using a moderately bright green color:
    //pixels.setPixelColor(i, pixels.Color(REDINTENSITY, GREENINTENSITY, BLUEINTENSITY));
    for (int j=0; j<(FOLLOWPIXELS + 1); j++ ){
      if(i > j-1)
      pixels.setPixelColor(i-j, pixels.Color(REDINTENSITY - j*round(REDINTENSITY/FOLLOWPIXELS) , GREENINTENSITY - j*round(GREENINTENSITY/FOLLOWPIXELS), BLUEINTENSITY - j*round(BLUEINTENSITY/FOLLOWPIXELS)));
    }
    

    pixels.show();   // Send the updated pixel colors to the hardware.

    delay(DELAYVAL); // Pause before next pass through loop
  }
}
nano:12
nano:11
nano:10
nano:9
nano:8
nano:7
nano:6
nano:5
nano:4
nano:3
nano:2
nano:GND.2
nano:RESET.2
nano:0
nano:1
nano:13
nano:3.3V
nano:AREF
nano:A0
nano:A1
nano:A2
nano:A3
nano:A4
nano:A5
nano:A6
nano:A7
nano:5V
nano:RESET
nano:GND.1
nano:VIN
nano:12.2
nano:5V.2
nano:13.2
nano:11.2
nano:RESET.3
nano:GND.3
ring1:GND
ring1:VCC
ring1:DIN
ring1:DOUT