Hey Kimheng,
Sure, no problem… So, I have the actual query code for the overdue tasks an actual item like so…
That then yields a list of items with their deadline dates listed from oldest to freshest (in my example you do not see these because the query does not support sorting by both scheduled and deadline dates.).
Does that help you? Sorry, was not quite sure what you mean by “demo”… but this is what I have (some things blurred for privacy reasons but should give you the gist.)