Biterscript to delete all files > 14 days old

I've been trying to create a script to delete all files within a tree structure that were created more than 14 days ago.

var str d, n, list, file
lf -r -n "*" $d (($ftype=="f") AND ($fctime < addtime(diff("-"+$n)))) > $list
while ($list <> "")
do
lex "1" $list > $file
system del ("\""+$file+"\"")
echo -e "DEBUG: Deleted file " $file
done

I've tried the above using "C:/Scripts/delete.txt" d("X:/mypath") n("14")
but it deletes all files including those created today.

I've also tried using $today to call today's date and subtracting 14 days, to no benefit.

Goals:
Delete all files older than 14 days in a directory tree structure
Run automatically w/o having to enter a date in the format mmddyyyy as I've seen with other scripts.