#include <TM1637Display.h>

// Pins for 4-digit 7-segment display:
#define CLK 6
#define DIO 5

// Create an object of type TM1637Display, representing the display:
TM1637Display display = TM1637Display(CLK, DIO);

// Array which sets all segments to on:
const uint8_t all_on[] = {0xff, 0xff, 0xff, 0xff};
// each entry above is 1111111 (in binary), i.e. 255 (base 10) in hexadecimal.

// Array which sets all segments to off:
const uint8_t blank[] = {0x00, 0x00, 0x00, 0x00};

// Can set individual segments to spell digits, words, or create other symbols
// by performing bitwise OR operations of the segments you need to turn on:
const uint8_t done[] = {
     SEG_B | SEG_C | SEG_D | SEG_E | SEG_G,           // d
     SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,   // o
     SEG_C | SEG_E | SEG_G,                           // n
     SEG_A | SEG_D | SEG_E | SEG_F | SEG_G            // e
};

int i = 0; // loop counter


void setup() {
 // put your setup code here, to run once:

     // Initialize 4-digit 7-segment display:
     display.clear();
     delay(1000);

     // Set the brightness:
     display.setBrightness(7);
     // Turn all segments on:
     display.setSegments(all_on);
     delay(2000);
     display.clear();
     delay(1000);
}


void loop() {
  // put your main code here, to run repeatedly:

     // Demonstration of displaying base-10 numbers on display:
    display.showNumberDec(i);
    delay(1000);

     // End counter, when it reaches 123:
     if (i>=123) {
          delay(2000);
          display.clear();
          delay(1000);
          display.setSegments(done);
          while(1); // hang here forever.
     }
     i = i+1; // increment loop counter.
}