#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h>
#endif

#define BUTTON_PIN   2

#define PIXEL_PIN    4

#define PIXEL_COUNT 16

Adafruit_NeoPixel strip(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);


void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  strip.begin();
  strip.show();

}

void loop() {
  boolean push = digitalRead(BUTTON_PIN);
  if(push == false){
    rainbow(10);
  }
}

void colorWipe(uint32_t color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, color);
    strip.show();
    delay(wait);
  }
}

void rainbow(int wait) {
  for(long firstPixelHue = 0; firstPixelHue < 3*65536; firstPixelHue += 256) {
    for(int i=0; i<strip.numPixels(); i++) {
      int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
      strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
      
  boolean push = digitalRead(BUTTON_PIN);
  if(push == true){
    colorWipe(strip.Color(255,   0,   0), 50);
  }
    }
    strip.show();
    delay(wait);
    }
  }