Variables with conditions - Locked options
I'm trying to create a menu that has options unavailable to the user until they have looked into each section.
For example Option one is available but options two three and four are I disabled state.
As option one is viewed and the user returns to the menu, I want option two to become available. and so on after two is viewed three become available etc.
Can anyone shed any light on what variables and conditions I need to add to get this working?!
Or point me in the direction of a tutorial.