Painting with light

Last night I went to see Bert . He's doing a photography course and he showed me this trick he learned recently. You set a long exposure on the camera e.g. 30sec and then (in the dark) use a torch to illuminate anything you want in the photo. These are not the most artistic examples but you get the idea. For the one above I lit myself first and then passed the torch around me facing the camera.

For this one I just shone the torch on myself and left it in certain postions for longer than others.

This one was done by lighting myself in one postion then moving in the dark and repeating.