(Thanks to wikipedia for the explanation, I'm saved!)
Have you ever try light painting before? No? Then you should try it. Normally, (for a DSLR users) to shoot a light painting you'll need to use the Bulb mode, small aperture and the lowest ISO setting available. But you can only see the results right after you've closed the shutter. I'm so pity with them.. :P
But that's not the case with the OM-D E-M1..
One of the neat features of this camera is the "Live Time" feature. It actually lets you preview your image at as it's being recorded!
To turn on this functionality, choose M mode (Manual mode) and turn the rear dial all the way to the left until you see it display "Live Time" (right after the Bulb mode). The default screen refresh rate is 0.5 second. Should you find it too fast, you can just change the setting in the Exp/p/ISO function menu, right under Live Time settings. You can configure up to 60 seconds of refresh rate per image or you can just touch the screen to refresh, but whatever your configuration will be, the display count can only support up to 24 times only - honestly that is more then enough for me.
Below is one sample photo that I've shot last night. My wife is a subject (or should I say victim) for this experiment and my kids just love to assist.. its play time!