Dynamic filter in listbox using Timer SDK component

Dear Experts,

I am beginner in design studio. I have a listbox which provides List of warehouses.

We have a Design Studio application which refresh every 15 secs on LCD screen by using Warehouse names in TIMER component to retrieve data for current date.

I used Start & Stop timer for all existing warehouses. I have total of 20 timers for 20 warehouses.

Question is, How do I make listbox to use only one timer component and refresh (filter) data for each warehouse dynamically for every 'n' secs. 

Please suggest if I can use array and foreach or Loops to select all available warehouse.

Thanks & Regards

Naveen V