I need help arduino nano countdown code from 25 to 0

I made the circuit but I can't write the code. And I think the circuit is wrong too. I have to hand over the circuit in a few days. If anyone has the relevant video or resource, can they share it?

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Can you show us what you have made?

What does your code currently look like?

It is quite similar to this project, but the buttons should not be used, I could not connect that side.

[https://electronics-project-hub.com/countdown-timer-circuit-diagram-with-7-segment-display/](h

You really do need to show what you have done to get any useful help

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