#include <TM1637Display.h>
#define CLK 2
#define DIO 3

TM1637Display display(CLK, DIO);

void setup() {
  randomSeed(analogRead(0));
  display.setBrightness(0x0f);
  display.showNumberDec(0);  
   
}

void loop() {
  int randomNumber = random(-50, 51);
  display.showNumberDec(randomNumber);
  delay(500);
}