SC2Mapster

I'd like to add an Or condition but I'm kinda confused, here's my problem: When I add the Or condition, it adds a kind of tree like argument:

Or - Stuff here

I was wondering, do I add every condition under the Or or do I put them like that:

If -

ConditionHere.

Or -

OtherConditionHere.

Or -

AgainAnotherConditionHere.

The OR condition has sub-conditions that are logically ORed together.
For example,
OR
  - a == 1
  - a == 2
will be true if a is 1 or a is 2.

For example, if you want to implement "If Condition A or Condition B or Condition C" you'd do this:

General - If (Conditions) then do (Actions) else do (Actions)
  If
    Or
      Conditions
        Condition A
        Condition B
        Condition C
      Then
      Else

As for another example:

General - If (Conditions) then do (Actions) else do (Actions)
  If
    Or
      Conditions
        Condition A
        Condition B
    Or
      Conditions
        Condition C
        Condition D
      Then
      Else

The above would be true "if (Condition A or Condition B) and (Condition C or Condition D)" was true.

Thanks a lot, that's what I was looking for.