Big Clock Matrix

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <Ds1302.h>


#define PIN 25 // This is the led signal pin

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,
  NEO_MATRIX_TOP    + NEO_MATRIX_LEFT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);
  
Ds1302 rtc (14,26,27); //(PIN_ENA, PIN_CLK, PIN_DAT)

byte last_second = 60;
byte h1,h2;
bool flash = 0; // Flashing Dots

const uint8_t hms [][2] = { // Array to separate the two digits hh mm ss
  {0,0},{0,1},{0,2},{0,3},{0,4},{0,5},{0,6},{0,7},{0,8},{0,9},
  {1,0},{1,1},{1,2},{1,3},{1,4},{1,5},{1,6},{1,7},{1,8},{1,9},
  {2,0},{2,1},{2,2},{2,3},{2,4},{2,5},{2,6},{2,7},{2,8},{2,9},
  {3,0},{3,1},{3,2},{3,3},{3,4},{3,5},{3,6},{3,7},{3,8},{3,9},
  {4,0},{4,1},{4,2},{4,3},{4,4},{4,5},{4,6},{4,7},{4,8},{4,9},
  {5,0},{5,1},{5,2},{5,3},{5,4},{5,5},{5,6},{5,7},{5,8},{5,9}
  };

const uint16_t colors[] = {
  matrix.Color(204, 0, 204), matrix.Color(204, 204, 0), matrix.Color(0, 255, 255),
  matrix.Color(255, 10, 127), matrix.Color(127, 0, 255), matrix.Color(0, 255, 0),
  matrix.Color(255, 99, 255), matrix.Color(204,177,0), matrix.Color(0,0,244) };  // Colour presets

static const uint8_t PROGMEM
num_bmp [] [7] = { // Bitmap Characters 0 - 9
  { // 0
    B01110,
    B10001,
    B10001,
    B10001,
    B10001,
    B10001,
    B01110,
  },
  { //1
    B00100,
    B01100,
    B00100,
    B00100,
    B00100,
    B00100,
    B01110,
  },
  { //2
    B01110,
    B10001,
    B00001,
    B00010,
    B00100,
    B01000,
    B11111,
  },
  { //3
    B01110,
    B10001,
    B00001,
    B00110,
    B00001,
    B10001,
    B01110,
  },
  { //4
    B10000,
    B10000,
    B10100,
    B10100,
    B01111,
    B00100,
    B00100,
  },
  { //5
    B11110,
    B10000,
    B10000,
    B01110,
    B00001,
    B10001,
    B01110,
  },
  { //6
    B01110,
    B10001,
    B10000,
    B11110,
    B10001,
    B10001,
    B01110,
  },
  { //7
    B11111,
    B00001,
    B00010,
    B00010,
    B00100,
    B00100,
    B01000,
  },
  { //8
    B01110,
    B10001,
    B10001,
    B01110,
    B10001,
    B10001,
    B01110,
  },
  { //9
    B01110,
    B10001,
    B10001,
    B01111,
    B00001,
    B10001,
    B01110,
  }
  
};


void setup() {
  rtc.init();
  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(20);
  matrix.setTextColor(colors[0]);
}


void loop() {

  Ds1302::DateTime now;
  rtc.getDateTime (&now);
  if (last_second != now.second) {
    last_second = now.second;
    matrix.fillScreen(0);
    if (flash) {
   matrix.drawPixel(10,2,colors[1]);
   matrix.drawPixel(10,5,colors[1]);
   matrix.drawPixel(21,2,colors[1]);
   matrix.drawPixel(21,5,colors[1]);
    }
    flash = !flash;
    h1 = hms[now.hour] [0];
    h2 = hms[now.hour] [1];
    matrix.drawBitmap(-3,1,num_bmp[h1],8,7,colors[2]);
    matrix.drawBitmap(2,1,num_bmp[h2],8,7,colors[2]);
    h1 = hms[now.minute] [0];
    h2 = hms[now.minute] [1];
    matrix.drawBitmap(8,1,num_bmp[h1],8,7,colors[2]);
    matrix.drawBitmap(13,1,num_bmp[h2],8,7,colors[2]);   
    h1 = hms[now.second] [0];
    h2 = hms[now.second] [1];
    matrix.drawBitmap(19,1,num_bmp[h1],8,7,colors[2]);
    matrix.drawBitmap(24,1,num_bmp[h2],8,7,colors[2]); 

    }
     matrix.show();   
  }