Arduino Clock

// Use if you want to force the software SPI subsystem to be used for some reason (generally, you don't)
// #define FASTLED_FORCE_SOFTWARE_SPI
// Use if you want to force non-accelerated pin access (hint: you really don't, it breaks lots of things)
// #define FASTLED_FORCE_SOFTWARE_SPI
// #define FASTLED_FORCE_SOFTWARE_PINS
#include <FastLED.h>

// How many leds are in the strip?
#define NUM_LEDS 12

// Data pin that led data will be written out over
#define DATA_PIN 3

// Clock pin only needed for SPI based chipsets when not using hardware SPI
//#define CLOCK_PIN 8


CRGB leds[NUM_LEDS];

int buttoncount=0;
int seconds=0;
int secondsColor=95;
int minutes=01;
int minutesColor=0;
int hours=12 ;
int hoursColor=160;

long previousMillis;


void setup() {
    // sanity check delay - allows reprogramming if accidently blowing power w/leds
    delay(1000);

      // Uncomment one of the following lines for your leds arrangement.
      // FastLED.addLeds<TM1803, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<TM1804, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<TM1809, DATA_PIN, RGB>(leds, NUM_LEDS);
      ///FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
      //FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);
      FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
      // FastLED.addLeds<APA104, DATA_PIN>(leds, NUM_LEDS);
      // FastLED.addLeds<WS2811_400, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<GW6205, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<GW6205_400, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<UCS1903, DATA_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<UCS1903B, DATA_PIN, RGB>(leds, NUM_LEDS);

      // FastLED.addLeds<WS2801, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<SM16716, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<LPD8806, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<P9813, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<APA102, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<DOTSTAR, RGB>(leds, NUM_LEDS);

      // FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<SM16716, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<P9813, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
      // FastLED.addLeds<DOTSTAR, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);

      FastLED.setBrightness(5);
      pinMode(7, INPUT);
      Serial.begin(19200);

      leds[0].setHSV(150,255,255);
      FastLED.show();
      delay(2000);
      FastLED.clear();

}

void loop() {
  incrementTime();
  showSeconds(seconds);
  showMinutes(minutes);
  showHours(hours);
  //printTime();
  tick(1000);

  FastLED.show();
//  delay(1000);

  FastLED.clear();

}

void showSeconds(int a){            // map secounds to led
  int b = map(a,1,60,0,NUM_LEDS-1);
  leds[b].setHSV(secondsColor,255,255);
//  Serial.print(a);
//  Serial.print(" ");
//  Serial.println(b);
}

void showMinutes(int a){            //map minutes to led
  int b = map(a,1,60,0,NUM_LEDS-1);
  leds[b].setHSV(minutesColor,255,255);
//  Serial.print(a);
//  Serial.print(" ");
//  Serial.println(b);
}

void showHours(int a){              //map hours to led
  if (NUM_LEDS > 12) {
    a = map(a,0,23,0,NUM_LEDS-1);
    leds[a].setHSV(hoursColor,255,255);
  }
  else
  {
  a = a%12;
  leds[a].setHSV(hoursColor,255,255);
}
}

void incrementTime(){               //roll seconds > minutes > hours
  //seconds++;
  if (seconds > 60){
    seconds = 1;
    minutes++;
  }
    if (minutes > 60){
    minutes = 1;
    hours++;
  }
    if (hours > 23){
    hours = 0;
  }
}

void printTime(){                   //print current time to serial
  Serial.print(hours);
  Serial.print(":");
  Serial.print(minutes);
  Serial.print(":");
  Serial.println(seconds);
}

void tick(int a){                        // increment secounds based on input millis
    if ( millis() - previousMillis >= a) {
    seconds++;
    previousMillis = millis();
    //Serial.println(previousMillis);
  }
}