1 More n00b question on scripts

1 More n00b question on scripts

Hello,
Thanks for all the help I have recieved here.   I was wondering if there is a way to 'auto delete' records after  7 days with the free account.  I have added the date field, and have it automatically filling in that information, just in case its needed for 'autodelete' functions.
 
I have looked around on the web and here, and I cannot find anything.  Sorry if this has been asked or is not possible.
 
Thanks again!