updating find and replace values in a macro loop

I am writing a macro that includes search and replace values. I want the macro to run multiple times, and each time, the "find" value should be the previous find +1, and similarly with "replace". Example: for the first loop, I want it to find all references to the number 1 and replace with the number 2. In the next loop, find all the 2s, and replace with 3, etc. Help much appreciated!

You stand a much better chance of getting help if you upload a small sample file to show the layout of your data and how you wish to get it "updated".

Alf