#include <Adafruit_NeoPixel.h>

#define PIXELS_PER_SEGMENT  16     // Number of LEDs in each Segment
#define PIXELS_DIGITS       4     // Number of connected Digits 
#define PIXELS_PIN          5     // GPIO Pin

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXELS_PER_SEGMENT * 7 * PIXELS_DIGITS, PIXELS_PIN, NEO_GRB + NEO_KHZ800);




//Digits array
byte digits[10] = {
  //abcdefg
  0b0111111,     // 0
  0b0000110,     // 1
  0b1011011,     // 2
  0b1001111,     // 3
  0b1100110,     // 4
  0b1101101,     // 5
  0b1111101,     // 6
  0b0000111,     // 7
  0b1111111,     // 8
  0b1101111,     // 9
};

//Clear all the Pixels
void clearDisplay() {
  for (int i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, strip.Color(0, 0, 0));
  }
  strip.show();
}

void setup() {
  strip.begin();
}

void loop() {

  disp_Digits(1000);            // Show digits from 0-9              (DelayTime)

}


void disp_Digits(int wait) {
  clearDisplay();
  for (int i = 0; i < 10; i++) {
    for (int n = 0; n < PIXELS_DIGITS; n++) {
      writeDigit(n, i);
    }
    strip.show();
    delay(wait);
  }
}





void writeDigit(int index, int val) {
  byte digit = digits[val];
  for (int i = 0; i <=6; i++) {
    int offset = index * (PIXELS_PER_SEGMENT * 7) + i * PIXELS_PER_SEGMENT;
    uint32_t color;
    if (digit & 0x01 != 0) {
      if (val == 1) color = strip.Color(50, 0,  0);
      if (val == 2) color = strip.Color(50, 50, 0);
      if (val == 3) color = strip.Color(50, 0, 50);
      if (val == 4) color = strip.Color(0, 50,  0);
      if (val == 5) color = strip.Color(0, 50, 50);
      if (val == 6) color = strip.Color(0,  0, 50);
      if (val == 7) color = strip.Color(50, 25, 0);
      if (val == 8) color = strip.Color(25, 5, 75);
      if (val == 9) color = strip.Color(75, 25, 5);
      if (val == 0) color = strip.Color(5, 75, 25);
    }
    else
      color = strip.Color(0, 0, 0);

    for (int j = offset; j < offset + PIXELS_PER_SEGMENT; j++) {
      strip.setPixelColor(j, color);
    }
    digit = digit >> 1;
  }
}