How combine 5 test fields together separate with a comma and space

I have a form with 5 fields.  One or all 5 may have text data in them.  Then on the form I also have a field that I want to combined the data from the 5 (or less) field into separate with a comma and a space.

So if for example field 1 has "Green", field 2 has "Orange", and field 3 has "Purple", then the combined field would read...  "Green, Orange, Purple"

How can I do this so that the combined field is updated after each of the other fields are updated?
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Amit KumarCommented:
Create a query and add below formula in new field. It will give you result as you required

Color: [Field1] & " ," & [Field2] & " ," & [Field3]
Dale FyeOwner, Developing Solutions LLCCommented:
I would use:

=Mid((", " + [Field1]) & (", " + [Field2]) & (", " + [Field3]) & (", " + [Field4]) & (", " + [Field5]), 3)

By using the + to concatenate the ", " to a field value, you ensure that the value inside each of those sets of parenthesis will return a NULL if the [Field#] is NULL).  This will ensure that you don't have any extra commas in the output.

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