Vizualize duration of events

Hello, I have time series data of tagged event duration in seconds. I tried to use Status History vizualization with the following query:

SELECT * FROM "product_feeds" WHERE  $timeFilter GROUP BY "feed_tag"::tag

The problem is that I see the duration only by color, not by length. What should I change to achieve better vizualization of length so that I can see overlapping events? Thanks.