Zoom in or out (as said before, it does not matter which) while shooting. Slow shutter speed, 1/15 sec.

The centre will be relatively clear; the outside more and more blurred. Wide angle lens works best, of course.

And in general, learn what slow shutter speeds do. If you want to be a good photographer, that’s how you learn: by doing, trying, experimenting.

What are you doing reading this? You should be shooting!