Light Painting 101

This month is my turn to host our photo group, and tomorrow we're doing light painting 101.
I thought before I set the challenge I should probably check if I can do it, so that's why the iris.
I can see how I can improve it, but hey, it's Sunday night and Billy's very confused that he's been in the dark for half an hour, so this'll do.

Because Blip has stopped showing my exif data, if anybody's interested i've added the numbers below.
ISO 100   25s  25mm (50mm eq) f14