Select "Mix Lines" in the resource, that way all the lines are mixed and thus it will have a random line. Or you can use javascript to mix the array list using function shuffle to get a better constant randomization. I believe there's also the option "Shuffle List" under the "List" option
@BAS-Viet-Nam solved brother, thanks.. i need dynamic tools for repeat thread without manual setting directory root folder. thanks for help. very thanks π