sleep in root scripts

Hi,

Apologies if this is an FAQ, but I've been unable so far to find an answer in the user guides etc.

I have a root script (attached) which is designed to monitor a root file and continuously update the histgrams in it on root canvases. To do this I have a while loop with a sleep statement

   gSystem->Sleep ( sleepTime );

which pauses for a fixed time (60 secs or whatever).

The problem is during this sleep time, ROOT is unresponsive. I cannot interactive with the canvases. I would like to be able to do this, to printout figures, quite ROOT etc. Not, outside the sleep, which the rest of the scrtipt is running, I can interactive with ROOT.

Is there a way I can do this, to get the root script to allow interaction whilst the sleep is running ?

cheers Chris