The target is any container through which you want to search.
The source is any container, variable or string for which you   want to search. If the source string begins with the “<”   character then the search is for any match of the source in   the target. (The “<” character is not treated as part of the   string.) Otherwise, the search is for an exact match of the   source with an item in the target.
The afterLine is an optional parameter specifying the line after   which to begin searching.
The afterItem is an optional parameter specifying the item   after which to begin searching.
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See the script of this card to find out how the "Beep" and "Visual" menus above are created and maintained.