Oh, this is harder than it looks.  How about a picture while I work on this.
15 seconds  Ok, I think I got it.  For your next challenge take some long exposures; I am leaving the definition of long up to you.

Some of the subject matter that comes to mind is still life.  1. 6 seconds  Or maybe plant life is something more for you.  1/2 seconds

If that is not your style, you can always go outdoors, for either a night shot 10 seconds or something during the day 1/5 seconds

 My personal preference is indoors, 1.6 seconds

Whatever your style is, go long.

I would like to thank kalole0 for giving me this chance.  For the next challenge, I nominate Ashton.