How do I make the script so that it doesn't clone something infinitely?

 local part = game.Workspace.Part
 LinkedSword = game.Lighting.LinkedSword
 while true do
     for i,v in pairs(game.Players:GetChildren()) do
	     if (v.Character.Torso.Position - part.Position).magnitude <= 15 then
	 	     c = game.Lighting.LinkedSword:clone()
		     c.Parent = v.Backpack
	     break
	     end
     end

     wait()
     end

I am trying to figure out how to stop the infinite cloning once you get into the range. Can anyone help assist me to figure this out? Thank you for reading this.