Displaying Custom Message in a Specific Category.

Hi.

I have a requirement, I want to display a message on a specific category. 

For instance: I have 20 Category in my community, but I have to display message only in one of the category.

Approach:

1) Create a custom component which has Code Logic :
    a) Trigger this component if current visited page is a category.
    b) Get category id.
    c) if category id == "mycategoryid"
    d) Display the content, else ignore

2)Add this component to Category Page.

Please let me know how can I implement  1.a and 1.b steps or a better way to implement this requirement.

Thanks