Guaranteeing four digits in a randomly generated number in Arduino

The Mechanism Of Guarantee To Generating Four Digits Number Randomly In Arduino

This Mechanism Is To Generating For One Time, To Get Multi Times Without Reset Button Recode It Inside A For-Loop Statement.

Link For The Project https://www.tinkercad.com/things/jO8cJQ3RVBF
Link For The Code: https://github.com/3rc0/arduino/blob/master/3rc0-Generator4Digits.ino