#include <Adafruit_NeoPixel.h>
#define PIN 8

int Color_to_lit = 1;

Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  Serial.begin(9600);
  attachInterrupt(digitalPinToInterrupt(3), Change_Led_Color, RISING);
  strip.begin();
  strip.setBrightness(1000);
  strip.show(); // Initialize all pixels to 'off'
}


void Change_Led_Color(){
  Color_to_lit=Color_to_lit+1;
  if (Color_to_lit==4) Color_to_lit=1;
}


void loop() {
  // Some example procedures showing how to display to the pixels:
  if(Color_to_lit==1){
  colorWipe(strip.Color(255, 0, 0), 500); // Red
  }
  if(Color_to_lit==2){
  colorWipe(strip.Color(0, 255, 0), 500); // Green
  }
  if(Color_to_lit==3){
  colorWipe(strip.Color(0, 0, 255), 500); // Blue
  }
  //rainbowCycle(20);
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}





/*
// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}


// 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) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else if(WheelPos < 170) {
    WheelPos -= 85;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  }
}
*/