How to write a formula that returns "Task Ovrdue" if a task is beyond (X) days

HI, Thanks in advance,
 
How do I write a formula that returns a "Current" or "Overdue" based on a field that tells how many days that task has to be performed and it has a Max activity date summary field, and a "Activities Due Every (x) Days" field.

Today()-[Max Activity Date]>([Activities Due Every (x) Days]),"Current","Activities Due"))

That was the best I could figure out. Thanks again