how to make "x inside box" form?

Question

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i want to make this form but the length, height and diagonal numbers are from the input (the example i made here is n=5)

Answer 1

https://code.sololearn.com/czqziBZZwqdg/?ref=app

is it this pattern?

Answer 2

I made it so the input is always uneven so it's easier to make the pattern