I want to create a stacked bar chart with some of the bars starting at an offset value (not starting at zero). How to do this?

ex:
X-Axis: 0,100,200,300,400...1000 [seconds]

Bar1 : Starts at 0 with 4 items [200,554,20,90]
Bar2 : Starts at 250 with 4 items[60, 200,100,90]

Thank you.