Recycle Briefcase to Treasure Pocket

// This is a demonstration on how to use an input device to trigger changes on your neo pixels.
// You should wire a momentary push button to connect from ground to a digital IO pin.  When you
// press the button it will change to a new pixel animation.  Note that you need to press the
// button once to start the first animation!

#include "Adafruit_NeoPixel.h"

#define BUTTON_PIN   2    // Digital IO pin connected to the button.  This will be
                          // driven with a pull-up resistor so the switch should
                          // pull the pin to ground momentarily.  On a high -> low
                          // transition the button press logic will execute.

#define PIXEL_PIN    6    // Digital IO pin connected to the NeoPixels.

#define PIXEL_COUNT 132

// Parameter 1 = number of pixels in strip,  neopixel stick has 8
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_RGB     Pixels are wired for RGB bitstream
//   NEO_GRB     Pixels are wired for GRB bitstream, correct for neopixel stick
//   NEO_KHZ400  400 KHz bitstream (e.g. FLORA pixels)
//   NEO_KHZ800  800 KHz bitstream (e.g. High Density LED strip), correct for neopixel stick
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

bool oldState = HIGH;
int showType = 0;
int K = 0;
bool dir_flag=0;

void setup() {
  pinMode(BUTTON_PIN, INPUT);
  strip.setBrightness(255);
  
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  bool newState = digitalRead(BUTTON_PIN);
  startShow(newState);
}

void startShow(int i) {
  switch(i){
    case 0: 
    for(int i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels())) & 255,1));
      delay(2);
      strip.show();
    }
    break;
    case 1: 
    if(K==0)
    {
    	dir_flag = 1;
    }else if(K>=255)
    {
    	dir_flag = 0;
    }
    if (dir_flag==1)
    {
    	K=K+1;
    }else
    {
    	K=K-1;
      if(K<0) K=0;
    }
    for (int q = 0; q < 3; q++) {
      for (int i = 0; i < strip.numPixels(); i = i + 3) {
        strip.setPixelColor(i + q, Wheel( (i + K) % 255,1)); //turn every third pixel on
      }
      strip.show();
      delay(30);
      for (int i = 0; i < strip.numPixels(); i = i + 3) {
        strip.setPixelColor(i + q, 0);      //turn every third pixel off
      }
    }
    break;
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos, float b) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color((255 - WheelPos * 3)*b, 0, WheelPos * 3*b);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3*b, (255 - WheelPos * 3)*b);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3 *b, (255 - WheelPos * 3)*b, 0);
}