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xmlquartz-composer

How can I periodically update the XML Importer in Quartz Composer?

I'm new to Quartz Composer so please excuse if this is obvious ... I have a Quartz Composer composition here that imports a XML file. I'd like it to update the imported file lets say every minute. I found the "update signal" input and tried to built a periodic signal to feed into it, but no success. (This is the Periodic Signal I used: http://quartzcompositions.com/phpBB2/mediawiki/index.php?title=Periodic_Signal&redirect=no)
Any help is appreciated! This is a for an animated layer in BoinxTV by the way. If anyone of you is familiar with that ...
Thanks,
thomas

Solution
    1. Create an instance of the built-in LFO (Wave Generator in Lion) patch
    2. Set the Type to Square
    3. Set the Period to 60 seconds
    4. Connect the output to the Update Signal input on the XML Importer patch.