int buttonPin = 2;
int segmentPins[] = {3, 4, 5, 6, 7, 8, 9};
int number = 0;

void setup() 
{
  for (int i = 0; i < 7; i++)
  {
    pinMode(segmentPins[i], OUTPUT);
  }

  pinMode(buttonPin, INPUT);
}

void loop() 
{
  if (digitalRead(buttonPin) == HIGH) 
  {
    number = (number + 1) % 10;
    displayNumber(number);
    delay(300);
  }
}

void displayNumber(int num) 
{
  byte segmentCodes[10][7] = 
  {
    {1, 1, 1, 1, 1, 1, 0},
    {0, 1, 1, 0, 0, 0, 0},
    {1, 1, 0, 1, 1, 0, 1},
    {1, 1, 1, 1, 0, 0, 1},
    {0, 1, 1, 0, 0, 1, 1},
    {1, 0, 1, 1, 0, 1, 1},
    {1, 0, 1, 1, 1, 1, 1},
    {1, 1, 1, 0, 0, 0, 0},
    {1, 1, 1, 1, 1, 1, 1},
    {1, 1, 1, 1, 0, 1, 1}
  };
 
  for (int i = 0; i < 7; i++) 
  {
    digitalWrite(segmentPins[i], segmentCodes[num][i]);
  }
}