NeoPixelRing.ino

#include <Adafruit_NeoPixel.h>

#define F_BTN_PIN 3	// forward button
#define B_BTN_PIN 4 // backward button

#define PIN 2	 // input pin Neopixel is attached to

#define NUMPIXELS      24 // number of neopixels in Ring
#define HALF_NUMPIXELS 12

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int delayval = 50; // timing delay

int redColor = 255;
int dimRedColor = 64;

int fBtnState = 0;
int bBtnState = 0;

void setup() {
  pixels.begin(); // Initializes the NeoPixel library.
  Serial.begin(9600);
  pinMode(F_BTN_PIN, INPUT);
  pinMode(B_BTN_PIN, INPUT);
}

void loop() {

  // read the state of the pushbutton value:
  fBtnState = digitalRead(F_BTN_PIN);
  bBtnState = digitalRead(B_BTN_PIN);
  
  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (fBtnState == HIGH) {
    //
    // Light up each LED in clockwise direction
    //
    for(int i=0;i<NUMPIXELS;i++){
        // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
        pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.

        pixels.show(); // This sends the updated pixel color to the hardware.

        delay(delayval); // Delay for a period of time (in milliseconds).
  	}

    for(int t = 0; t < 20; t++) {
      for(int i=HALF_NUMPIXELS;i<NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(dimRedColor, 0, 0)); // Moderately bright green color.
      }
      for(int i=HALF_NUMPIXELS+1;i<NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.
      }

      pixels.show();
	  delay(delayval);
      
      for(int i=HALF_NUMPIXELS+1;i<NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(dimRedColor, 0, 0)); // Moderately bright green color.
      }
      for(int i=HALF_NUMPIXELS;i<NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.
      }

      pixels.show();
	  delay(delayval);
  	}
  
	for(int i=0;i<NUMPIXELS;i++){
      // turn off led
      pixels.setPixelColor(i, pixels.Color(0, 0, 0)); // Moderately bright green color.

      pixels.show();

      delay(delayval); // Delay for a period of time (in milliseconds).
  	}
  } else if (bBtnState == HIGH) {
    //
    // Light up each LED in counter-clockwise direction
    //
    for(int i=NUMPIXELS-1;i>=0;i--){
        // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
        pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.

        pixels.show(); // This sends the updated pixel color to the hardware.

        delay(delayval); // Delay for a period of time (in milliseconds).
  	}

    for(int t = 0; t < 20; t++) {
      for(int i=0; i <= HALF_NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(dimRedColor, 0, 0)); // Moderately bright green color.
      }
      for(int i=1; i <= HALF_NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.
      }

      pixels.show();
	  delay(delayval);
      
      for(int i=1; i <= HALF_NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(dimRedColor, 0, 0)); // Moderately bright green color.
      }
      for(int i=0; i <= HALF_NUMPIXELS;i+=2){
          pixels.setPixelColor(i, pixels.Color(redColor, 0, 0)); // Moderately bright green color.
      }

      pixels.show();
	  delay(delayval);
  	}
  
	for(int i=NUMPIXELS-1;i>=0;i--){
      // turn off led
      pixels.setPixelColor(i, pixels.Color(0, 0, 0)); // Moderately bright green color.

      pixels.show();

      delay(delayval); // Delay for a period of time (in milliseconds).
  	}
  }
}