#include <FastLED.h>

#define DATA_PIN     4
#define NUM_LEDS    16
#define COLOR_ORDER GRB
#define BRIGHTNESS 255
#define CHIPSET WS2812B
#define VOLTS 5
#define MAX_AMPS 5000

const int buttonPin = 3;
const int ledPin = 13;
int buttonState = 0;

CRGB leds[NUM_LEDS];

void setup()

{

FastLED.addLeds<CHIPSET, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS);
FastLED.setMaxPowerInVoltsAndMilliamps(VOLTS, MAX_AMPS);
FastLED.setBrightness(BRIGHTNESS);
FastLED.clear();
FastLED.show();
int color[] = {0xff0000,0x00ff00,0x0000ff,0xffff00};


pinMode(ledPin, OUTPUT);  
pinMode(buttonPin, INPUT_PULLUP);
}


void loop()
{



buttonState = digitalRead(buttonPin);
  if(buttonState == LOW)
  {
    digitalWrite(ledPin,HIGH);
    leds[0] = CRGB(255,0,0); //RED
    leds[1] = CRGB(0,255,0); //GREEN
    //leds[2] = CRGB(0,0,255); //BLUE
    leds[2] = CRGB(0x0000ff); //BLUE
    leds[3] = CRGB(0xffff00); //YELLOW
    FastLED.show();

  }
  
  else
  {
  digitalWrite(ledPin,LOW);
   FastLED.clear();
   FastLED.show(); 

  }
}