// TM1637 Display with Arduino - Countdown Timer
#include <TM1637Display.h>

#define CLK 2
#define DIO 3

TM1637Display display(CLK, DIO);

void setup() {
  display.setBrightness(7);
}

void loop() {
  for (int i = 30; i >= 0; i--) {
    display.showNumberDec(i, true);  // Display with leading zero (e.g., 09)
    delay(1000);
  }
  
  display.clear();
  delay(2000);
}