>the only think i could think
>of was to make it recursive, even though it isn't (because the
>sched#sched_in call returns immediately).

Here's how I did this same thing using LablTk a long time ago.  I was 
originally not removing the timer at the end of the run and tk would 
eventually freak out after a bunch of runs.

let rec timer_t = ref
     (let rec add_timer () = Timer.add ~ms:1
         ~callback:(fun () -> (try display togl with _ -> ()); timer_t := 
add_timer ()) in
     add_timer ())
in

blah..

Timer.remove !timer_t

Chris

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