7 segment Display Watch

Projects General Guidance
6

I would show the digits as part of this

void digitalClockDisplay(){
  // digital clock display of the time
  Serial.print(hour());
  printDigits(minute());
  printDigits(second());
  Serial.print(" ");
  Serial.print(day());
  Serial.print(" ");
  Serial.print(month());
  Serial.print(" ");
  Serial.print(year()); 
  Serial.println(); 
}

Make an array of number fonts, drive the segments from that array.
Every 4 seconds, update a digit. Display second only when button is pressed.