Need Context segment created at multiple levels under Descriptive flexfields

Summary:

We have an enhancement request where the fields need to appear based on values selected in the drop down.
Explanation: (L1 to L9 fields are in use)
If L1 is Y, display field L2. else if L1 is N, display field L3
In the above example, If L2 is Y, display field L4 else display L5
In the above example, If L4 is Y, display field L6 else display L7
In the above example, If L6 is Y, display field L8 else display L9

Need 4 or more levels set up

Please guide on how to set-up this structure using Descriptive flexfields.