Dependant tasks

[lazlo24]

Hi

Does anyone have any tricks on how to make dependant tasks.

Say I have three tasks.
Task 1
Task 2
Task 3

Task 3 is dependant on task 2 being complete and cannot be started until this is true
Task 2 is dependant on task 1 being complete and cannot be started until this is true

What I want to hide Task 2 until Task 1 is complete and hide task 3 until task 2 is complete. This way I only get to see what can be done, one task at a time.

Is there a way of expressing this in a search or some thing like this?

Thanks
Lazlo24