position: 'middle_center',

once a notification will show my module, it should appear in fullscreen mode for (i.e.) 20 seconds, no other modules should be displayed during this time. The fullscreen mode has the background color red and a very large font size. After this 20 seconds, the fullscreen is not necessary anymore and the module should be displayed in its “middle_center” position.
What could be the best way to solve this?

Thanks!