---

#include <QuadDisplay.h>

#define DISPLAY_PIN 9
#define BUTTON_PIN 4

void setup()
{
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  randomSeed(analogRead(A0));
  displayInt(DISPLAY_PIN, 0);
}

void loop()
{
  if (digitalRead(BUTTON_PIN) == LOW) 
    displayClear(DISPLAY_PIN);
    delay(100);
    displayInt(DISPLAY_PIN, random(0, 10000));
    delay(300);
  }
}