-- run sp_blocker_pss80

WHILE 1=1
BEGIN
   EXEC master.dbo.sp_blocker_pss80
   -- Or for fast mode
   -- EXEC master.dbo.sp_blocker_pss80 @fast=1
   -- Or for latch mode
   -- EXEC master.dbo.sp_blocker_pss80 @latch=1
   WAITFOR DELAY '00:00:15'
END
GO