#include <Arduino.h>
#include <Adafruit_NeoPixel.h>

#define BTN 3
#define PIN            4
#define NUMPIXELS      1

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

int delayval = 500;
 int i = 0;
 int mode = 0;
//#define WHITE pixel.Color(255, 255, 255) 
//#define RED pixel.Color(255, 0, 0) 
//#define GREEN pixel.Color(0, 255, 0) 
//#define BLUE pixel.Color(0, 0, 255) 




void setup() {
  pixels.begin();
  pinMode(BTN, INPUT);
  randomSeed(analogRead(0));

}

void loop() {
  // put your main code here, to run repeatedly:
  if(BTN == LOW){
    i++;
    mode = i;
    if(i > 4){
      i = 0;
    }
  if(mode == 0){
    pixels.setPixelColor(1, pixels.Color(255, 255, 255));
  }
  if(mode == 1){
    pixels.setPixelColor(1, pixels.Color(255, 0, 0));
  }
  if(mode == 2){
    pixels.setPixelColor(1, pixels.Color(0, 255, 0));
  }
  if(mode == 3){
    pixels.setPixelColor(1, pixels.Color(0, 0, 255));
  }
  pixels.show();
  if(mode == 4){
    int r = random(128);
    int g = random(128);
    int b = random(128);

    for(int i=0;i<NUMPIXELS;i++){
      pixels.setPixelColor(i, pixels.Color(r,g,b));
      pixels.show(); // This sends the updated pixel color to the hardware.
      delay(delayval); // Delay for a period of time (in milliseconds).
    }
  }  
    //setMode(i);
    }
}

void setMode(uint8_t mode){
  
}