#include <TM1637Display.h>

// Define the connections to the display
#define CLK 22  // Clock pin (D22)
#define DIO 21  // Data pin (D21)

// Create an instance of the TM1637 display
TM1637Display display(CLK, DIO);

// Variables for time
int hours = 0;
int seconds = 0;
unsigned long previousMillis = 0; // To track time

void setup() {
  // Set the brightness of the display (0-7)
  display.setBrightness(7);
}

void loop() {
  // Get the current time in milliseconds
  unsigned long currentMillis = millis();

  // Update time every second
  if (currentMillis - previousMillis >= 1000) {
    previousMillis = currentMillis;
    seconds++;

    // Increment the hour when seconds reach 60
    if (seconds >= 60) {
      seconds = 0;
      hours++;
    }

    // Reset hours if it reaches 24 (like a clock)
    if (hours >= 24) {
      hours = 0;
    }

    // Display the time in HH:SS format
    displayTime(hours, seconds);
  }
}

// Function to display time in HH:SS format
void displayTime(int hours, int seconds) {
  int displayValue = (hours * 100) + (seconds); // Combine hours and seconds into one number

  // Show time with a colon between hours and seconds
  display.showNumberDecEx(displayValue, 0b01000000, true);
}