Try this:

SELECT GETDATE()              --your query to run
raiserror('',0,1) with nowait --to flush the buffer
waitfor delay '00:00:10'      --pause for 10 seconds
GO 5                          --loop 5 times

It will run the query 5 times, pausing for 10 seconds between each run

Output:

Beginning execution loop

-----------------------
2011-03-25 11:03:57.640
(1 row(s) affected)

-----------------------
2011-03-25 11:04:07.640
(1 row(s) affected)

-----------------------
2011-03-25 11:04:17.640
(1 row(s) affected)

-----------------------
2011-03-25 11:04:27.640
(1 row(s) affected)

-----------------------
2011-03-25 11:04:37.640
(1 row(s) affected)

Batch execution completed 5 times.

The only thing I can think of that would do that enitrely from SSMS would be a loop with a WAITFOR option. The problem is your output query window will simply have multiple result sets, each one later in your process than the one before it.

In this situation I usually suggest building a simple web page that runs from locally on your machine. Build it to take a query, and set it to auto-refresh every interval (30-60-90 seconds).

But that would be outside SSMS.