Giving a random resource from multiple set resources
I would like to know if it is possible to have a clickable choose randomly between two or more resources and give me that random resources. Example:
gives 1 Xresource or Yresource or Zresource for Xcost
Something like that. The word "or" doesn't seem to work. What can I do to make the Clickable choose between those three resources and give me Xamount of a random resource.