#include <TM1637TinyDisplay.h>
 
TM1637TinyDisplay display(14, 12);
int counter = 0;

void setup() {
  display.setBrightness(100);
  pinMode(13, INPUT_PULLUP);
  Serial.begin(115200);
  Serial.write("hello");
  delay(100);
}
 
void loop() {
  display.showString(String(counter).c_str());
  if (digitalRead(13 == LOW))
  {
    Serial.write(counter);
    counter++;
  }
  delay(10);
}