c The subroutine to analyze
      subroutine do_something()
c For testing we just do nothing for 3 seconds
      call sleep(3)
      return
      end

c Main Program
      program timing
      integer(kind=8) start,finish,rate
      call system_clock(count_rate=rate)
      call system_clock(start)
c Here comes the function we want to time
      call do_something()
      call system_clock(finish)
      write(6,*) 'Elapsed Time in seconds:',float(finish-start)/rate
      return
      end