A couple of weeks ago our "Queen of the Night" Cactus (night blooming Cereus) did its thing, so I tried my hand at using the Time Lapse feature on my E-M1. If this works correctly, you should be able to click on the image and see the video. In Firefox browser, it will open a new tab, go to my SmugMug account and launch the viewer. When it is done, just close the tab.
I messed up because half way through I tried to zoom in closer. So there are two videos. It only blooms once a year, so I'll have to wait a year to try and do better.