Adding values to concatenate function by clicking buttons

Hello,

I would like to build concatenate function using buttons with assigned macros:

1)
I create button called "concatenate start" and want to assign to it a macro that
send value to any cell I select equals to =concatenate(

2) next buttons after click should add remaining value to =concatenate function i.e. Main Category button -> =concatenate("Main Category"

3) next button after click add semicolon in active cell -> =concatenate("Main Category";

and so on.


In general how can I build =concenation function in any selected cell by clicking buttons which adding values to other values in this cell.

I have many rows with data and it is easier to click buttons than coping/pasting data

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