#include <TM1637.h>

const int CLK = 2;
const int DIO = 3;

TM1637 tm(CLK, DIO);

void setup() {
  Serial.begin(9600);
  tm.init();
  tm.set(BRIGHT_TYPICAL);
}

unsigned long currentTime = 0;

void loop() {
  tm.display(0, (currentTime / 1000) % 10);
  tm.display(1, (currentTime / 100) % 10);
  tm.display(2, (currentTime / 10) % 10);
  tm.display(3, currentTime % 10);

  currentTime++;

  delay(1000);
}