Custom Visual Studio approval workflow with Approval levels

Hi All,

Here I have a requirement on custom approval workflow:

We have 4 levels of approvers, for example:

L1 Approvers - user1 or user2

L2 Approver - user3

L3 Approver - user4

L4 Approver - user5

L1 -->L2-->L3--> L4 this is order of approval.

I need to design a visual studio approval workflow in such a way that if any one from  L1 Approvers approve the task it should be send to L2 approvers, and then L3 and L4 Approvers in sequence.

Can someone help in handling the section of L1 approvers i.e., if user1 or user2 approves then it should be send to next level.

Thank you in advance

Vikram 

vikram padigala